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bdu:2025-12739

2026-10-18T09:37:44.162019+00:00

bdu:2025-12739

EUVD-2026-247621

2026-10-18T09:37:44.162049+00:00

EUVD-2026-247621

fkie_cve-2025-53836

2026-10-18T09:37:44.162063+00:00

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.

GHSA-32mf-57h2-64x9 — XWiki Rendering is vulnerable to RCE attacks when processing nested macros

2026-10-18T09:37:44.162101+00:00

Affected: Maven: org.xwiki.rendering:xwiki-rendering-transformation-macro

### 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](https://extensions.xwiki.org/xwiki/bin/view/Extension/Cache%20Macro) and [chart](https://extensions.xwiki.org/xwiki/bin/view/Extension/Chart%20Macro) 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 commen…