What’s Vulnerable › Vulnerabilities

CVE-2021-36128

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-07-02 · updated 2026-06-17
• Weakness: CWE-755

Description

An issue was discovered in the CentralAuth extension in MediaWiki through 1.36. Autoblocks for CentralAuth-issued suppression blocks are not properly implemented.

Affected products

• Wikimedia Foundation MediaWiki: through 1.36

References

• https://gerrit.wikimedia.org/r/q/I15d14c88a1e30df92c470bc191c4ee573172d4d1
• https://gerrit.wikimedia.org/r/q/I3e65690695313380c798b62edfda726b6e374f89
• https://phabricator.wikimedia.org/T281972
• https://gerrit.wikimedia.org/r/q/I15d14c88a1e30df92c470bc191c4ee573172d4d1
• https://gerrit.wikimedia.org/r/q/I3e65690695313380c798b62edfda726b6e374f89
• https://phabricator.wikimedia.org/T281972

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