What’s Vulnerable › Vulnerabilities

CVE-2021-42046

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% 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 the GlobalWatchlist extension in MediaWiki through 1.36.2. The rev-deleted-user and ntimes messages were not properly escaped and allowed for users to inject HTML and JavaScript.

Affected products

• Wikimedia Foundation MediaWiki: through 1.36.2

References

• https://gerrit.wikimedia.org/r/q/Ib7f9b009730fe0df283cec1169f84c7a83a58b1d
• https://gerrit.wikimedia.org/r/q/Id2204fb5afe591d63764466de35ac0aaa5999983
• https://phabricator.wikimedia.org/T286385
• https://gerrit.wikimedia.org/r/q/Ib7f9b009730fe0df283cec1169f84c7a83a58b1d
• https://gerrit.wikimedia.org/r/q/Id2204fb5afe591d63764466de35ac0aaa5999983
• https://phabricator.wikimedia.org/T286385

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