diff --git a/cloudflare.php b/cloudflare.php
index 2e871378..d7c147c5 100644
--- a/cloudflare.php
+++ b/cloudflare.php
@@ -3,7 +3,7 @@
 Plugin Name: Cloudflare
 Plugin URI: https://blog.cloudflare.com/new-wordpress-plugin/
 Description: Cloudflare speeds up and protects your WordPress site.
-Version: 4.12.2
+Version: 4.12.3
 Requires PHP: 7.2
 Author: Cloudflare, Inc.
 License: BSD-3-Clause
diff --git a/composer.json b/composer.json
index fae7306f..81872aa3 100644
--- a/composer.json
+++ b/composer.json
@@ -32,10 +32,13 @@
   "_comment": [
     "php-compatibility-install comes from https://github.com/wimg/PHPCompatibility/issues/102#issuecomment-255778195"
   ],
-  "version": "4.12.2",
+  "version": "4.12.3",
   "config": {
     "platform": {
       "php": "7.2"
+    },
+    "allow-plugins": {
+      "dealerdirect/phpcodesniffer-composer-installer": true
     }
   }
 }
diff --git a/composer.lock b/composer.lock
index 1b17f069..665ddcbb 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "a987cff52dafa5d452325c87a697c037",
+    "content-hash": "81cf626cde1c20ac88b5cd2600882735",
     "packages": [
         {
             "name": "cloudflare/cf-ip-rewrite",
@@ -107,16 +107,16 @@
         },
         {
             "name": "symfony/polyfill-intl-idn",
-            "version": "v1.27.0",
+            "version": "v1.28.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "639084e360537a19f9ee352433b84ce831f3d2da"
+                "reference": "ecaafce9f77234a6a449d29e49267ba10499116d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/639084e360537a19f9ee352433b84ce831f3d2da",
-                "reference": "639084e360537a19f9ee352433b84ce831f3d2da",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/ecaafce9f77234a6a449d29e49267ba10499116d",
+                "reference": "ecaafce9f77234a6a449d29e49267ba10499116d",
                 "shasum": ""
             },
             "require": {
@@ -130,7 +130,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.27-dev"
+                    "dev-main": "1.28-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -174,7 +174,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-intl-idn/tree/v1.27.0"
+                "source": "https://github.com/symfony/polyfill-intl-idn/tree/v1.28.0"
             },
             "funding": [
                 {
@@ -190,20 +190,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-11-03T14:55:06+00:00"
+            "time": "2023-01-26T09:30:37+00:00"
         },
         {
             "name": "symfony/polyfill-intl-normalizer",
-            "version": "v1.27.0",
+            "version": "v1.28.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-normalizer.git",
-                "reference": "19bd1e4fcd5b91116f14d8533c57831ed00571b6"
+                "reference": "8c4ad05dd0120b6a53c1ca374dca2ad0a1c4ed92"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/19bd1e4fcd5b91116f14d8533c57831ed00571b6",
-                "reference": "19bd1e4fcd5b91116f14d8533c57831ed00571b6",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/8c4ad05dd0120b6a53c1ca374dca2ad0a1c4ed92",
+                "reference": "8c4ad05dd0120b6a53c1ca374dca2ad0a1c4ed92",
                 "shasum": ""
             },
             "require": {
@@ -215,7 +215,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.27-dev"
+                    "dev-main": "1.28-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -258,7 +258,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-intl-normalizer/tree/v1.27.0"
+                "source": "https://github.com/symfony/polyfill-intl-normalizer/tree/v1.28.0"
             },
             "funding": [
                 {
@@ -274,20 +274,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-11-03T14:55:06+00:00"
+            "time": "2023-01-26T09:26:14+00:00"
         },
         {
             "name": "symfony/polyfill-php72",
-            "version": "v1.27.0",
+            "version": "v1.28.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php72.git",
-                "reference": "869329b1e9894268a8a61dabb69153029b7a8c97"
+                "reference": "70f4aebd92afca2f865444d30a4d2151c13c3179"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/869329b1e9894268a8a61dabb69153029b7a8c97",
-                "reference": "869329b1e9894268a8a61dabb69153029b7a8c97",
+                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/70f4aebd92afca2f865444d30a4d2151c13c3179",
+                "reference": "70f4aebd92afca2f865444d30a4d2151c13c3179",
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@@ -296,7 +296,7 @@
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             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.27-dev"
+                    "dev-main": "1.28-dev"
                 },
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                     "name": "symfony/polyfill",
@@ -334,7 +334,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-php72/tree/v1.27.0"
+                "source": "https://github.com/symfony/polyfill-php72/tree/v1.28.0"
             },
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@@ -350,7 +350,7 @@
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                 }
             ],
-            "time": "2022-11-03T14:55:06+00:00"
+            "time": "2023-01-26T09:26:14+00:00"
         }
     ],
     "packages-dev": [
@@ -865,16 +865,16 @@
         },
         {
             "name": "php-mock/php-mock-phpunit",
-            "version": "2.7.2",
+            "version": "2.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-mock/php-mock-phpunit.git",
-                "reference": "33a99c190d078e77864b8d74cdc91cc4e5342598"
+                "reference": "3dabfd474d43da4d1d2fee5260c634457c5da344"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-mock/php-mock-phpunit/zipball/33a99c190d078e77864b8d74cdc91cc4e5342598",
-                "reference": "33a99c190d078e77864b8d74cdc91cc4e5342598",
+                "url": "https://api.github.com/repos/php-mock/php-mock-phpunit/zipball/3dabfd474d43da4d1d2fee5260c634457c5da344",
+                "reference": "3dabfd474d43da4d1d2fee5260c634457c5da344",
                 "shasum": ""
             },
             "require": {
@@ -921,7 +921,7 @@
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             "support": {
                 "issues": "https://github.com/php-mock/php-mock-phpunit/issues",
-                "source": "https://github.com/php-mock/php-mock-phpunit/tree/2.7.2"
+                "source": "https://github.com/php-mock/php-mock-phpunit/tree/2.9.0"
             },
             "funding": [
                 {
@@ -929,7 +929,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2023-06-13T07:46:04+00:00"
+            "time": "2023-12-01T21:50:22+00:00"
         },
         {
             "name": "phpcompatibility/php-compatibility",
@@ -1452,16 +1452,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "8.5.33",
+            "version": "8.5.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "7d1ff0e8c6b35db78ff13e3e05517d7cbf7aa32e"
+                "reference": "9652df58e06a681429d8cfdaec3c43d6de581d5a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/7d1ff0e8c6b35db78ff13e3e05517d7cbf7aa32e",
-                "reference": "7d1ff0e8c6b35db78ff13e3e05517d7cbf7aa32e",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/9652df58e06a681429d8cfdaec3c43d6de581d5a",
+                "reference": "9652df58e06a681429d8cfdaec3c43d6de581d5a",
                 "shasum": ""
             },
             "require": {
@@ -1491,9 +1491,9 @@
                 "sebastian/version": "^2.0.1"
             },
             "suggest": {
-                "ext-soap": "*",
-                "ext-xdebug": "*",
-                "phpunit/php-invoker": "^2.0.0"
+                "ext-soap": "To be able to generate mocks based on WSDL files",
+                "ext-xdebug": "PHP extension that provides line coverage as well as branch and path coverage",
+                "phpunit/php-invoker": "To allow enforcing time limits"
             },
             "bin": [
                 "phpunit"
@@ -1529,7 +1529,8 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/8.5.33"
+                "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/8.5.36"
             },
             "funding": [
                 {
@@ -1545,7 +1546,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-02-27T13:04:50+00:00"
+            "time": "2023-12-01T16:52:15+00:00"
         },
         {
             "name": "sebastian/code-unit-reverse-lookup",
@@ -1884,16 +1885,16 @@
         },
         {
             "name": "sebastian/global-state",
-            "version": "3.0.2",
+            "version": "3.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/global-state.git",
-                "reference": "de036ec91d55d2a9e0db2ba975b512cdb1c23921"
+                "reference": "66783ce213de415b451b904bfef9dda0cf9aeae0"
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-                "reference": "de036ec91d55d2a9e0db2ba975b512cdb1c23921",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/66783ce213de415b451b904bfef9dda0cf9aeae0",
+                "reference": "66783ce213de415b451b904bfef9dda0cf9aeae0",
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@@ -1936,7 +1937,7 @@
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                 "issues": "https://github.com/sebastianbergmann/global-state/issues",
-                "source": "https://github.com/sebastianbergmann/global-state/tree/3.0.2"
+                "source": "https://github.com/sebastianbergmann/global-state/tree/3.0.3"
             },
             "funding": [
                 {
@@ -1944,7 +1945,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2022-02-10T06:55:38+00:00"
+            "time": "2023-08-02T09:23:32+00:00"
         },
         {
             "name": "sebastian/object-enumerator",
@@ -2278,16 +2279,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.7.2",
+            "version": "3.8.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "ed8e00df0a83aa96acf703f8c2979ff33341f879"
+                "url": "https://github.com/PHPCSStandards/PHP_CodeSniffer.git",
+                "reference": "5805f7a4e4958dbb5e944ef1e6edae0a303765e7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/ed8e00df0a83aa96acf703f8c2979ff33341f879",
-                "reference": "ed8e00df0a83aa96acf703f8c2979ff33341f879",
+                "url": "https://api.github.com/repos/PHPCSStandards/PHP_CodeSniffer/zipball/5805f7a4e4958dbb5e944ef1e6edae0a303765e7",
+                "reference": "5805f7a4e4958dbb5e944ef1e6edae0a303765e7",
                 "shasum": ""
             },
             "require": {
@@ -2297,7 +2298,7 @@
                 "php": ">=5.4.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
+                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0 || ^9.0"
             },
             "bin": [
                 "bin/phpcs",
@@ -2316,35 +2317,58 @@
             "authors": [
                 {
                     "name": "Greg Sherwood",
-                    "role": "lead"
+                    "role": "Former lead"
+                },
+                {
+                    "name": "Juliette Reinders Folmer",
+                    "role": "Current lead"
+                },
+                {
+                    "name": "Contributors",
+                    "homepage": "https://github.com/PHPCSStandards/PHP_CodeSniffer/graphs/contributors"
                 }
             ],
             "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
-            "homepage": "https://github.com/squizlabs/PHP_CodeSniffer",
+            "homepage": "https://github.com/PHPCSStandards/PHP_CodeSniffer",
             "keywords": [
                 "phpcs",
                 "standards",
                 "static analysis"
             ],
             "support": {
-                "issues": "https://github.com/squizlabs/PHP_CodeSniffer/issues",
-                "source": "https://github.com/squizlabs/PHP_CodeSniffer",
-                "wiki": "https://github.com/squizlabs/PHP_CodeSniffer/wiki"
+                "issues": "https://github.com/PHPCSStandards/PHP_CodeSniffer/issues",
+                "security": "https://github.com/PHPCSStandards/PHP_CodeSniffer/security/policy",
+                "source": "https://github.com/PHPCSStandards/PHP_CodeSniffer",
+                "wiki": "https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki"
             },
-            "time": "2023-02-22T23:07:41+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/PHPCSStandards",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/jrfnl",
+                    "type": "github"
+                },
+                {
+                    "url": "https://opencollective.com/php_codesniffer",
+                    "type": "open_collective"
+                }
+            ],
+            "time": "2023-12-08T12:32:31+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.27.0",
+            "version": "v1.28.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "5bbc823adecdae860bb64756d639ecfec17b050a"
+                "reference": "ea208ce43cbb04af6867b4fdddb1bdbf84cc28cb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/5bbc823adecdae860bb64756d639ecfec17b050a",
-                "reference": "5bbc823adecdae860bb64756d639ecfec17b050a",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/ea208ce43cbb04af6867b4fdddb1bdbf84cc28cb",
+                "reference": "ea208ce43cbb04af6867b4fdddb1bdbf84cc28cb",
                 "shasum": ""
             },
             "require": {
@@ -2359,7 +2383,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.27-dev"
+                    "dev-main": "1.28-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -2397,7 +2421,7 @@
                 "portable"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.27.0"
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.28.0"
             },
             "funding": [
                 {
@@ -2413,7 +2437,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-11-03T14:55:06+00:00"
+            "time": "2023-01-26T09:26:14+00:00"
         },
         {
             "name": "symfony/yaml",
@@ -2470,16 +2494,16 @@
         },
         {
             "name": "theseer/tokenizer",
-            "version": "1.2.1",
+            "version": "1.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e"
+                "reference": "b2ad5003ca10d4ee50a12da31de12a5774ba6b96"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/34a41e998c2183e22995f158c581e7b5e755ab9e",
-                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/b2ad5003ca10d4ee50a12da31de12a5774ba6b96",
+                "reference": "b2ad5003ca10d4ee50a12da31de12a5774ba6b96",
                 "shasum": ""
             },
             "require": {
@@ -2508,7 +2532,7 @@
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
             "support": {
                 "issues": "https://github.com/theseer/tokenizer/issues",
-                "source": "https://github.com/theseer/tokenizer/tree/1.2.1"
+                "source": "https://github.com/theseer/tokenizer/tree/1.2.2"
             },
             "funding": [
                 {
@@ -2516,7 +2540,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-07-28T10:34:58+00:00"
+            "time": "2023-11-20T00:12:19+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -2587,5 +2611,5 @@
     "platform-overrides": {
         "php": "7.2"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.6.0"
 }
diff --git a/config.json b/config.json
index 23c5e860..922825d8 100644
--- a/config.json
+++ b/config.json
@@ -25,5 +25,5 @@
   },
   "locale": "en",
   "integrationName": "wordpress",
-  "version": "4.12.2"
+  "version": "4.12.3"
 }
diff --git a/readme.txt b/readme.txt
index eba04db1..72c1a1dc 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: icyapril, manatarms, thillcf, deuill, epatryk, jacobbednarz
 Tags: cloudflare, seo, ssl, ddos, speed, security, cdn, performance, free
 Requires at least: 3.4
 Tested up to: 6.2
-Stable tag: 4.12.2
+Stable tag: 4.12.3
 Requires PHP: 7.2
 License: BSD-3-Clause
 
@@ -98,6 +98,10 @@ Yes, Cloudflare works with, and helps speed up your site even more, if you have
 == Screenshots ==
 
 == Changelog ==
+= 4.12.3 - 2024-01-04 =
+
+* Prevent usage of `cloudflare_proxy` action on /admin-ajax endpoint for non-Administrator users
+
 = 4.12.2 - 2023-07-18 =
 
 * Revert the incorrect fix to Cloudflare Partners endpoint