What’s Vulnerable › Vulnerabilities

CVE-2026-103444: Stored XSS through system messages in WikiForum

• Severity: low (CVSS 1.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-09-30
• Weakness: CWE-80

Description

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki WikiForum extension allows Stored XSS. This issue affects MediaWiki WikiForum extension: master.

Affected products

• The Wikimedia Foundation MediaWiki WikiForum extension: master

References

• https://gerrit.wikimedia.org/r/q/I7849ef0f9c3eff48fd63e47e5b8affc3b25bb4dd
• https://phabricator.wikimedia.org/T414227

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