CVE-2025-53836

Public Exploit
XWiki Rendering is vulnerable to RCE attacks when processing nested macros

Description

XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Starting in version 4.2-milestone-1 and prior to versions 13.10.11, 14.4.7, and 14.10, the default macro content parser doesn't preserve the restricted attribute of the transformation context when executing nested macros. This allows executing macros that are normally forbidden in restricted mode, in particular script macros. The cache and chart macros that are bundled in XWiki use the vulnerable feature. This has been patched in XWiki 13.10.11, 14.4.7 and 14.10. To avoid the exploitation of this bug, comments can be disabled for untrusted users until an upgrade to a patched version has been performed. Note that users with edit rights will still be able to add comments via the object editor even if comments have been disabled.

Category

9.9
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.89% Top 30%
Third-Party Advisory github.com
Affected: xwiki xwiki-rendering
Published at:
Updated at:

References

Link Tags
https://github.com/xwiki/xwiki-rendering/security/advisories/GHSA-32mf-57h2-64x9 third party advisory
https://github.com/xwiki/xwiki-rendering/commit/c73fa3ccd4ac59057e48e5d4325f659e78e8f86d patch
https://jira.xwiki.org/browse/XRENDERING-689 issue tracking exploit
https://jira.xwiki.org/browse/XWIKI-20375 issue tracking exploit

Frequently Asked Questions

What is the severity of CVE-2025-53836?
CVE-2025-53836 has been scored as a critical severity vulnerability.
How to fix CVE-2025-53836?
To fix CVE-2025-53836, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-53836 being actively exploited in the wild?
It is possible that CVE-2025-53836 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-53836?
CVE-2025-53836 affects xwiki xwiki-rendering.
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