What’s Vulnerable › Vulnerabilities

CVE-2021-36131

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-02 · updated 2026-06-17
• Weakness: CWE-79

Description

An XSS issue was discovered in the SportsTeams extension in MediaWiki through 1.36. Within several special pages, a privileged user could inject arbitrary HTML and JavaScript within various data fields. The attack could easily propagate across many pages for many users.

Affected products

• Wikimedia Foundation MediaWiki: through 1.36

References

• https://gerrit.wikimedia.org/r/q/Ic312cc9b8463c8e7c3298a661abfcff2cc2332cb
• https://phabricator.wikimedia.org/T281196
• https://gerrit.wikimedia.org/r/q/Ic312cc9b8463c8e7c3298a661abfcff2cc2332cb
• https://phabricator.wikimedia.org/T281196

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