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The vulnerability stems from the deletespace.vm template directly using the xredirect parameter value in a URL context without proper sanitization. The commit diff shows the patched version replaces the unsafe assignment with #getSanitizedURLAttributeValue, a macro introduced to validate URLs. The unpatched code's line '#set ($cancelURL = $request.xredirect)' allowed arbitrary JavaScript execution when the parameter value started with 'javascript:'. This matches the XSS pattern described in CWE-79 and CWE-87.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| org.xwiki.platform:xwiki-platform-web-templates | maven | >= 3.4-milestone-1, < 14.10.5 | 14.10.5 |
| org.xwiki.platform:xwiki-platform-web-templates | maven | >= 15.0-rc-1, < 15.1-rc-1 | 15.1-rc-1 |
Ongoing coverage of React2Shell