Impact
XWiki is vulnerable to reflected cross-site scripting (RXSS) via the rev
parameter that is used in the content of the content menu without escaping. If an attacker can convince a user to visit a link with a crafted parameter, this allows the attacker to execute arbitrary actions in the name of the user, including remote code (Groovy) execution in the case of a user with programming right, compromising the confidentiality, integrity and availability of the whole XWiki installation.
The vulnerability can be demonstrated by opening <xwiki-host>/xwiki/bin/view/Main/?rev=xar%3Aorg.xwiki.platform%3Axwiki-platform-distribution-flavor-common%2F15.5%25%25%22%3e%3cscript%3ealert(1)%3c%2fscript%3e
where <xwiki-host>
is the URL of your XWiki installation. If an alert is displayed, the installation is vulnerable.
Patches
This has been patched in XWiki 15.6 RC1, 15.5.1 and 14.10.14.
Workarounds
The patch can be manually applied without upgrading (or restarting) the instance.
References
Attribution
We thank Agostino Parentela, Vulnerability Management Engineer of TicketOne S.p.A., agostino.parentela@ticketone.it for reporting this vulnerability.
References
Impact
XWiki is vulnerable to reflected cross-site scripting (RXSS) via the
rev
parameter that is used in the content of the content menu without escaping. If an attacker can convince a user to visit a link with a crafted parameter, this allows the attacker to execute arbitrary actions in the name of the user, including remote code (Groovy) execution in the case of a user with programming right, compromising the confidentiality, integrity and availability of the whole XWiki installation.The vulnerability can be demonstrated by opening
<xwiki-host>/xwiki/bin/view/Main/?rev=xar%3Aorg.xwiki.platform%3Axwiki-platform-distribution-flavor-common%2F15.5%25%25%22%3e%3cscript%3ealert(1)%3c%2fscript%3e
where<xwiki-host>
is the URL of your XWiki installation. If an alert is displayed, the installation is vulnerable.Patches
This has been patched in XWiki 15.6 RC1, 15.5.1 and 14.10.14.
Workarounds
The patch can be manually applied without upgrading (or restarting) the instance.
References
Attribution
We thank Agostino Parentela, Vulnerability Management Engineer of TicketOne S.p.A., agostino.parentela@ticketone.it for reporting this vulnerability.
References