Cross-site scripting (XSS) vulnerability in MediaWiki before 1.19.24, 1.2x before 1.23.9, and 1.24.x before 1.24.2, when using HHVM, allows remote attackers to inject arbitrary web script or HTML via an invalid parameter in a wddx format request to api.php, which is not properly handled in an error message, related to unsafe calls to wddx_serialize_value.
Severity
Medium 4.3
Published
13 Apr 2015
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD
Affected software
Software
Affected versions
MediaWikiServers and applications · cpe:a:mediawiki:mediawiki