What’s Vulnerable › Vulnerabilities

CVE-2021-42045

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-29 · updated 2026-06-17
• Weakness: CWE-79

Description

An issue was discovered in SecurePoll in the Growth extension in MediaWiki through 1.36.2. Simple polls allow users to create alerts by changing their User-Agent HTTP header and submitting a vote.

Affected products

• Wikimedia Foundation MediaWiki: through 1.36.2

References

• https://gerrit.wikimedia.org/r/q/I4f04083cd00884d3b85245460774c81c7639a578
• https://phabricator.wikimedia.org/T289385
• https://gerrit.wikimedia.org/r/q/I4f04083cd00884d3b85245460774c81c7639a578
• https://phabricator.wikimedia.org/T289385

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