Description
includes/upload/UploadBase.php in MediaWiki before 1.19.12, 1.20.x and 1.21.x before 1.21.6, and 1.22.x before 1.22.3 does not prevent use of invalid namespaces in SVG files, which allows remote attackers to conduct cross-site scripting (XSS) attacks via an SVG upload, as demonstrated by use of a W3C XHTML namespace in conjunction with an IFRAME element.
Remediation
References
Related Vulnerabilities
SharePoint CVE-2021-31948 Vulnerability (CVE-2021-31948)
Jenkins Improper Certificate Validation Vulnerability (CVE-2017-1000396)
WordPress Plugin OptionTree PHP Object Injection (2.7.2)
WordPress Plugin SendPress Newsletters Unspecified Vulnerability (1.7.6.11)
WordPress Plugin WordPress Download Manager Cross-Site Request Forgery (2.9.60)