What’s Vulnerable › Vulnerabilities

CVE-2021-36125

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-07-02 · updated 2026-06-17
• Weakness: CWE-835

Description

An issue was discovered in the CentralAuth extension in MediaWiki through 1.36. The Special:GlobalRenameRequest page is vulnerable to infinite loops and denial of service attacks when a user's current username is beyond an arbitrary maximum configuration value (MaxNameChars).

Affected products

• Wikimedia Foundation MediaWiki: through 1.36

References

• https://gerrit.wikimedia.org/r/q/I97d8b3236b5abed8ba9a9c4d3ab5050c2e782c22
• https://phabricator.wikimedia.org/T260865
• https://gerrit.wikimedia.org/r/q/I97d8b3236b5abed8ba9a9c4d3ab5050c2e782c22
• https://phabricator.wikimedia.org/T260865

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