Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-32mf-57h2-64x9
No affected components available
Impact
The default macro content parser didn'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. The following XWiki syntax, when used inside a comment in XWiki, demonstrates the privilege escalation from comment right to programming right and thus remote code execution (RCE) that is possible due to this:
{{cache}}{{groovy}}println("Hello from Groovy!"){{/groovy}}{{/cache}}
This vulnerability exists since the restricted attribute has been added to the transformation context in version 4.2.
Patches
This has been patched in XWiki 13.10.11, 14.4.7 and 14.10.
Workarounds
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.
Resources
- https://github.com/xwiki/xwiki-rendering/commit/c73fa3ccd4ac59057e48e5d4325f659e78e8f86d
- https://jira.xwiki.org/browse/XRENDERING-689
- https://jira.xwiki.org/browse/XWIKI-20375
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira XWiki.org
- Email us at Security Mailing List
Attribution
This vulnerability has been reported on Intigriti by René de Sain @renniepak.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard