CVE-2025-53835
published 2025-07-14CVE-2025-53835: 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…
PriorityP348critical9CVSS 3.1
AVNACLPRLUIRSCCHIHAH
EPSS
0.33%
24.2th percentile
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 5.4.5 and prior to version 14.10, the XHTML syntax depended on the `xdom+xml/current` syntax which allows the creation of raw blocks that permit the insertion of arbitrary HTML content including JavaScript. This allows XSS attacks for users who can edit a document like their user profile (enabled by default). This has been fixed in version 14.10 by removing the dependency on the `xdom+xml/current` syntax from the XHTML syntax. Note that the `xdom+xml` syntax is still vulnerable to this attack. As it's main purpose is testing and its use is quite difficult, this syntax shouldn't be installed or used on a regular wiki. There are no known workarounds apart from upgrading.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| xwiki | xwiki | >= 5.4.5 < 14.10 | 14.10 |
| xwiki | xwiki-rendering | — | — |
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OSV
XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
osv·2025-07-14
CVE-2025-53835 [CRITICAL] XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
### Impact
The XHTML syntax depended on the `xdom+xml/current` syntax which allows the creation of raw blocks that permit the insertion of arbitrary HTML content including JavaScript. This allows XSS attacks for users who can edit a document like their user profile (enabled by default). The attack works by setting the document's syntax to `xdom+xml/current` and then inserting content like
```
syntaxXHTMLxhtml5
```
This has been fixed by removing the dependency on the `xdom+xml/current` syntax from the XHTML syntax. Note that the `xdom+xml` syntax is still vulnerable to this attack. As it's main purpose is testing and its use is quite difficult, this syntax shouldn't be installed or used on a regular wiki. We're cu
GHSA
XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
ghsa·2025-07-14
CVE-2025-53835 [CRITICAL] CWE-79 XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
### Impact
The XHTML syntax depended on the `xdom+xml/current` syntax which allows the creation of raw blocks that permit the insertion of arbitrary HTML content including JavaScript. This allows XSS attacks for users who can edit a document like their user profile (enabled by default). The attack works by setting the document's syntax to `xdom+xml/current` and then inserting content like
```
syntaxXHTMLxhtml5
```
This has been fixed by removing the dependency on the `xdom+xml/current` syntax from the XHTML syntax. Note that the `xdom+xml` syntax is still vulnerable to this attack. As it's main purpose is testing and its use is quite difficult, this syntax shouldn't be installed or used on a regular wiki. We're cu
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-07-14
Published