CVE-2012-5391: n/a vulnerability

Security readout for executives and security teams

CVE-2012-5391 is a MediaWiki session fixation issue affecting older releases. A remote attacker could hijack a web session through the session_id behavior in Special:UserLogin. The business concern is account misuse on exposed wiki systems, especially where privileged users authenticate to outdated MediaWiki instances. Exposure is likely limited to organizations still running the named outdated MediaWiki branches or downstream packages based on them. Internet-facing wikis with authenticated users and reachable Special:UserLogin are the main concern. Current MediaWiki deployments are likely unaffected if upgraded beyond the fixed versions. Handle during normal vulnerability remediation unless an exposed, outdated, business-critical wiki is found. Escalate priority if administrators or sensitive content depend on an affected instance, because successful exploitation could compromise trusted sessions. Mitigation focus: Upgrade MediaWiki to 1.18.6, 1.19.3, 1.20.1, or a later supported release.; Apply relevant Fedora MediaWiki package updates where Fedora packages are used.; Check current MediaWiki vendor guidance for any branch-specific upgrade notes..

Prepared: Jun 14, 2026, 07:40 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 2, 2014, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

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-cve20125391-session-hijacking(83008)CVE reference · vdb-entry, x_refsource_XF
https://bugzilla.wikimedia.org/show_bug.cgi?id=40995CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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CVE-2012-5391: Session fixation vulnerability in Special:UserLogin in MediaWiki before 1.18.6, 1.19.x before 1.19.3, and 1...