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MediaWiki CVE-2026-58024

| EUVDEUVD-2026-41034 MEDIUM
Information Exposure (CWE-200)
2026-07-01 wikimedia-foundation GHSA-5mf7-4fq5-g3gp
PHP Information Disclosure Mediawiki
5.1
CVSS 4.0 · Vendor: wikimedia-foundation
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Severity by source

Vendor (wikimedia-foundation) PRIMARY
5.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
3.5 LOW

Network-accessible API endpoint, authenticated low-privilege user required (PR:L), passive interaction dependency maps to UI:R, confidentiality impact is low with no integrity or availability effect.

3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (wikimedia-foundation).

CVSS VectorVendor: wikimedia-foundation

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
P
Scope
X

Lifecycle Timeline

2
Patch available
Jul 01, 2026 - 17:01 EUVD
Analysis Generated
Jul 01, 2026 - 16:05 vuln.today

DescriptionCVE.org

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki.

This vulnerability is associated with program files includes/Api/ApiUserrights.Php.

This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

AnalysisAI

Information disclosure in MediaWiki's ApiUserrights.php exposes sensitive user rights data to authenticated actors who should not have access to it. All MediaWiki installations running versions prior to 1.43.9, 1.44.6, 1.45.4, and 1.46.0 are affected. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege MediaWiki account
Exploit
Authenticate and acquire session token
Execution
Monitor or trigger action=userrights API call
Impact
Extract leaked sensitive user rights data from response
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid authenticated session on the target MediaWiki instance (PR:L - at minimum a basic registered user account). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 5.1 with vector AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N reflects a moderate-severity information disclosure. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated MediaWiki user with a low-privilege account calls the action=userrights API endpoint while a privileged user performs a rights-management action. The API response leaks sensitive user rights metadata - such as group membership changes or actor identifiers - that the low-privilege caller should not be able to observe. …
Remediation Upgrade MediaWiki to one of the patched releases: 1.43.9, 1.44.6, 1.45.4, or 1.46.0, whichever aligns with the currently deployed branch. … Detailed patch versions, workarounds, and compensating controls in full report.
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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-58024 vulnerability details – vuln.today
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