ProofreadPage vulnerability

What happened

An issue was discovered in the ProofreadPage extension for MediaWiki through 1.39.3. It leaks information about a suppressed user via the API and config variables.

Affected versions

ProofreadPage: before 1.35.11 (semver); 1.36.0 through before 1.38.7 (semver); 1.39.0 through before 1.39.4 (semver) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.