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CVE-2023-35155 is a low severity vulnerability with a CVSS score of 0.0. Exploits are available; patches have been released and should be applied urgently.
Lower probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS).
For instance, the following URL execute an alter on the browser: <xwiki-host>/xwiki/bin/view/Main/?viewer=share&send=1&target=&target=%3Cimg+src+onerror%3Dalert%28document.domain%29%3E+%3Cimg+src+onerror%3Dalert%28document.domain%29%3E+%3Crenniepak%40intigriti.me%3E&includeDocument=inline&message=I+wanted+to+share+this+page+with+you., where <xwiki-host> is the URL of your XWiki installation.
See https://jira.xwiki.org/browse/XWIKI-20370 for me details.
The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.4, and 14.4.8.
The fix is only impacting Velocity templates and page contents, so applying this patch is enough to fix the issue.
https://jira.xwiki.org/browse/XWIKI-20370
If you have any questions or comments about this advisory:
This vulnerability has been reported on Intigriti by René de Sain @renniepak.
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