Restricted content disclosure via missing compare authorization
Published Oct 21, 2025 · Updated Oct 21, 2025
Authorization bypass in Wikimedia Foundation MediaWiki Lockdown Extension before 1.42 allows remote attackers to read restricted pages via Action API. ApiComparePages omits authorizeRead for ordinary pages and returns comparison data after checking only deleted pages and revisions. No authentication is required, but exploitation requires readable API access, a Lockdown-restricted page, and knowledge of its page ID.
Summary
What happened
Authorization bypass in Wikimedia Foundation MediaWiki Lockdown Extension before 1.42 allows remote attackers to read restricted pages via Action API. ApiComparePages omits authorizeRead for ordinary pages and returns comparison data after checking only deleted pages and revisions. No authentication is required, but exploitation requires readable API access, a Lockdown-restricted page, and knowledge of its page ID.
The record
- CVE
- CVE-2025-12004
- Published
- Oct 21, 2025
- Updated
- Oct 21, 2025
- Vendor
- Wikimedia Foundation
- Product
- MediaWiki Lockdown Extension
- Classifications
- CWE-732, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 21, 2025CVE publishedPublication date reported by the CVE source.
- Oct 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=master <1.42
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Action API compare protected-page requestproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Exploitation against lakeus.xyzreported exploitation
Technologies
Your stack
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Your stack
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