Security readout for executives and security teams
This flaw affects MediaWiki sites using the CentralAuth extension. In affected releases, a user who had not actually logged in could still receive a cookie representing a valid CentralAuth user, enabling passwordless authentication bypass. For organizations running legacy MediaWiki, this is a serious account-access risk. Exposure is likely limited to legacy MediaWiki installations that used CentralAuth on the affected version branches. The bundle does not identify other products or supported modern versions as affected. Treat as high priority if any legacy MediaWiki CentralAuth deployment remains exposed. Authentication bypass can undermine user trust and content integrity, but urgency depends on whether the affected old versions are still present. Mitigation focus: Upgrade affected MediaWiki branches to 1.19.8, 1.20.7, 1.21.2, or later supported releases.; Prioritize internet-facing wikis and deployments using CentralAuth for shared login.; Check Wikimedia and MediaWiki advisories for any deployment-specific guidance..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Credential and access behavior lookup
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Open ATT&CK lookupCVE-2013-4304 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- mediawiki-cve20134304-security-bypass(86894)CVE reference · vdb-entry, x_refsource_XF
- https://bugzilla.wikimedia.org/show_bug.cgi?id=52338CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
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