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Wikimedia Foundation — Vulnerabilities & Security Advisories 152

Browse all 152 CVE security advisories affecting Wikimedia Foundation. AI-powered Chinese analysis, POCs, and references for each vulnerability.

The Wikimedia Foundation operates the world’s largest collaborative encyclopedia platform, hosting Wikipedia and related projects that serve billions of monthly visitors. Its infrastructure relies on complex software stacks, including MediaWiki, which has historically been susceptible to various vulnerability classes. Common issues include cross-site scripting (XSS), SQL injection, and remote code execution (RCE) stemming from legacy code paths or misconfigurations. While the organization maintains a robust security posture with regular audits and bug bounty programs, the sheer scale of its codebase and the open nature of its editing model present unique challenges. Recent years have seen efforts to mitigate privilege escalation risks and improve input validation. Despite these ongoing technical hurdles, the Foundation remains a critical public resource, balancing transparency with the need to protect user data and system integrity against sophisticated cyber threats targeting its extensive digital footprint.

CVE ID Title CVSS Severity Published
CVE-2025-6591 HTML injection in API action=feedcontributions output from i18n message — MediaWiki 8.2AI High AI 2026-02-02
CVE-2025-6592 Creating a permanent account from a temporary account associates temp username and IP address with real username in AbuseLog — AbuseFilter 9.8AI Critical AI 2026-02-02
CVE-2025-6593 "{{SITENAME}} registered email address has been changed" email sent to unverified email addresses — MediaWiki 8.1AI High AI 2026-02-02
CVE-2025-6594 XSS in Special:ApiSandbox — MediaWiki CWE-79 6.1AI Medium AI 2026-02-02
CVE-2025-6595 MediaWiki 安全漏洞 — MultimediaViewer CWE-79 6.1AI Medium AI 2026-02-02
CVE-2025-6596 Vector inserts portlet labels as HTML, allowing for stored XSS through system messages — Vector CWE-79 6.1AI Medium AI 2026-02-02
CVE-2025-6597 MediaWiki should not consider autocreation as login for the purposes of security reauthentication — MediaWiki 9.8AI Critical AI 2026-02-02
CVE-2025-6927 Autoblocks from global account suppressions are publicly visible — MediaWiki 8.2AI High AI 2026-02-02
CVE-2026-0817 CampaignEvents API missing authorization exposes meeting and chat URLs — MediaWiki - CampaignEvents extension CWE-862 8.8 - 2026-01-09
CVE-2026-0671 Multiple stored i18n/message-key XSSes in UploadWizard — MediaWiki - UploadWizard extension CWE-79 6.1 - 2026-01-08
CVE-2026-0670 Stored XSS through a system message and a user-provided parameter in ProofreadPage — MediaWiki - ProofreadPage Extension CWE-79 6.1 - 2026-01-07
CVE-2026-0669 Path Traversal vulnerability in CSS extension on certain web servers — MediaWiki - CSS extension CWE-22 7.5 - 2026-01-07
CVE-2026-0668 VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input — MediaWiki - VisualData Extension CWE-1333 7.5 - 2026-01-07
CVE-2025-52738 WordPress Wikipedia Preview plugin <= 1.15.0 - Broken Access Control vulnerability — Wikipedia Preview CWE-862 6.5 Medium 2025-10-22
CVE-2025-62665 Stored XSS through system messages in Skin:BlueSky — Mediawiki - Skin:BlueSky CWE-79 6.1AI Medium AI 2025-10-18
CVE-2025-7363 TitleIcon: Stored Cross-Site Scripting (XSS) via #titleicon_unicode parser function — Mediawiki - TitleIcon extension CWE-79 5.4AI Medium AI 2025-07-08
CVE-2025-7362 MsUpload: Stored Cross-Site Scripting (XSS) via unsanitized msu-continue system message — Mediawiki - MsUpload extension CWE-79 5.4AI Medium AI 2025-07-08
CVE-2025-53479 CheckUser: Reflected Cross-Site Scripting (XSS) in Special:CheckUser via unsanitized internationalized message — Mediawiki - CheckUser extension CWE-79 6.1AI Medium AI 2025-07-08
CVE-2025-53480 CheckUser: Reflected Cross-Site Scripting (XSS) in Special:Investigate (Account information tab) via unsanitized i18n messages — Mediawiki - CheckUser extension CWE-79 6.1AI Medium AI 2025-07-08
CVE-2025-53496 Stored XSS in MediaSearch — Mediawiki - MediaSearch Extension CWE-79 6.1AI Medium AI 2025-07-07
CVE-2025-53488 Stored XSS in WikiHiero — Mediawiki - WikiHiero Extension CWE-79 5.4AI Medium AI 2025-07-07
CVE-2025-53498 Lack of Audit Logging in AbuseFilter — Mediawiki - AbuseFilter Extension CWE-778 5.3AI Medium AI 2025-07-07
CVE-2025-53499 Unauthorized Inspection of Protected Variables in AbuseFilter — Mediawiki - AbuseFilter Extension CWE-862 9.8AI Critical AI 2025-07-07
CVE-2025-53495 Unauthorized Disclosure of IP Reputation in AbuseFilter — Mediawiki - AbuseFilter Extension CWE-862 9.8AI Critical AI 2025-07-07
CVE-2025-53478 CheckUser: Reflected Cross-Site Scripting (XSS) in Special:Investigate via unsanitized i18n messages — Mediawiki - CheckUser extension CWE-79 6.1AI Medium AI 2025-07-07
CVE-2025-53497 Stored XSS in RelatedArticles — Mediawiki - RelatedArticles Extension CWE-79 5.4AI Medium AI 2025-07-07
CVE-2025-53491 XSS in FlaggedRevs — Mediawiki - FlaggedRevs Extension CWE-79 6.1AI Medium AI 2025-07-07
CVE-2025-53487 ApprovedRevs: Stored Cross-Site Scripting (XSS) via unsanitized system messages — Mediawiki - ApprovedRevs extension CWE-79 5.4AI Medium AI 2025-07-07
CVE-2025-7057 Stored XSS in Quiz — Mediawiki - Quiz Extension CWE-79 6.1AI Medium AI 2025-07-07
CVE-2025-53486 WikiCategoryTagCloud: Reflected Cross-Site Scripting (XSS) via linkstyle attribute in parser function — Mediawiki - WikiCategoryTagCloud extension CWE-79 6.1AI Medium AI 2025-07-07

This page lists every published CVE security advisory associated with Wikimedia Foundation. Each entry links to a detailed page with CVSS scoring, CWE classification, affected products and references. AI-generated Chinese analysis is provided for fast triage.