EUVD-2026-40900
GHSA-vjf9-r75w-m9fv
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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
CSRF canonically requires victim interaction (UI:R); impact is limited to redirect content manipulation (I:L) with no confidentiality or availability consequence from redirect forgery alone.
Primary rating from Vendor (wikimedia-foundation).
CVSS VectorVendor: wikimedia-foundation
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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
Lifecycle Timeline
2DescriptionCVE.org
Cross-Site request forgery (CSRF) vulnerability in The Wikimedia Foundation Mediawiki - RedirectManager Extension allows Cross Site Request Forgery.
This issue affects Mediawiki - RedirectManager Extension: from * before 1.3.3.
AnalysisAI
Cross-site request forgery in the Wikimedia Foundation's MediaWiki RedirectManager Extension (all versions before 1.3.3) enables remote attackers to perform unauthorized redirect management actions on behalf of authenticated wiki users. The CVSS 4.0 base score of 6.9 (Medium) reflects network-accessible exploitation with low impact across confidentiality, integrity, and availability dimensions on both vulnerable and subsequent systems. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Successful exploitation requires that the victim hold an active authenticated session in a MediaWiki instance with the RedirectManager Extension installed and enabled (a non-default, opt-in configuration). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.9 (Medium) is assigned with a vector of AV:N/AC:L/AT:N/PR:N/UI:N, which warrants explicit scrutiny: UI:N is atypical for CWE-352 CSRF, which canonically requires a victim to interact with a malicious page (CVSS 4.0 would normally assign UI:P for passive interaction, or UI:A for active). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious webpage containing a hidden HTML form or JavaScript fetch targeting the affected wiki's redirect management endpoint, then delivers a link to it via phishing or by embedding it in an external site. When an authenticated wiki editor visits the page, their browser automatically includes the MediaWiki session cookie, causing the wiki to process the forged redirect action as a legitimate user request, potentially creating, modifying, or deleting wiki redirects without the victim's knowledge. … |
| Remediation | Upgrade the MediaWiki RedirectManager Extension to version 1.3.3 or later, which incorporates the CSRF protection fix implemented in Gerrit change https://gerrit.wikimedia.org/r/c/mediawiki/extensions/RedirectManager/+/1275494. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-352 – Cross-Site Request Forgery (CSRF)
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External POC / Exploit Code
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