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CVE-2025-6596— Vector inserts portlet labels as HTML, allowing for stored XSS through system messages

Quick assessment

Affected
Wikimedia Foundation Vector
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wikimedia Vector是Wikimedia基金会的一个桌面端界面外观。 Wikimedia Vector存在安全漏洞，该漏洞源于对网页生成期间输入的中和不当，可能导致跨站脚本。以下版本受到影响：1.40.0至1.42.7之前版本、1.43.2版本和1.44.0版本。

AI Predicted 6.1 Difficulty: Easy EPSS 0.44% · P36
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I. Basic Information for CVE-2025-6596

Vulnerability Information
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Vulnerability Title
Vector inserts portlet labels as HTML, allowing for stored XSS through system messages
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Vector. This vulnerability is associated with program files resources/skins.Vector.Js/portlets.Js, resources/skins.Vector.Legacy.Js/portlets.Js. This issue affects Vector: from >= 1.40.0 before 1.42.7, 1.43.2, 1.44.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Wikimedia Vector 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wikimedia Vector是Wikimedia基金会的一个桌面端界面外观。 Wikimedia Vector存在安全漏洞，该漏洞源于对网页生成期间输入的中和不当，可能导致跨站脚本。以下版本受到影响：1.40.0至1.42.7之前版本、1.43.2版本和1.44.0版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wikimedia Foundation Vector >= 1.40.0 ~ 1.42.7, 1.43.2, 1.44.0 -

II. Public POCs for CVE-2025-6596

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III. Intelligence Information for CVE-2025-6596

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Same Patch Batch · Wikimedia Foundation · 2026-02-02 · 21 CVEs total

CVE-2025-61636 Codex Special:Block vulnerable to message key XSS
CVE-2025-61642 Stored XSS through system messages provided to CodexHtmlForms
CVE-2025-61644 i18n XSS through Special:Watchlist
CVE-2025-61643 EventStreams publishes suppressed recent change entries that are suppressed from their cre
CVE-2025-61641 API list=allpages with maxsize is making really slow queries
CVE-2025-61638 Sanitizer::validateAttributes data-XSS
CVE-2025-61634 HTML rest endpoint needs PoolCounter and proper parser cache check
CVE-2025-61640 Stored XSS through system messages in Special:RecentChangesLinked (MW Core)
CVE-2025-61637 Stored XSS through system messages in MW Core
CVE-2025-61639 Suppressed blocked IP is visible in Special:BlockList, RC, and other places
CVE-2025-6594 XSS in Special:ApiSandbox
CVE-2025-61635 Add rate limiting to ApiFancyCaptchaReload
CVE-2025-6591 HTML injection in API action=feedcontributions output from i18n message
CVE-2025-6595 MediaWiki 安全漏洞
CVE-2025-6592 Creating a permanent account from a temporary account associates temp username and IP addr
CVE-2025-6927 Autoblocks from global account suppressions are publicly visible
CVE-2025-6597 MediaWiki should not consider autocreation as login for the purposes of security reauthent
CVE-2025-6593 "{{SITENAME}} registered email address has been changed" email sent to unverified email ad
CVE-2025-6589 With MultiBlocks enabled and a user who is suppressed via a MultiBlock, a user without 'hi
CVE-2025-6590 Complete content leak of private wikis due to PasswordReset Wikitext injection in error me

IV. Related Vulnerabilities

Same product: Vector
Same vendor: Wikimedia Foundation
Same weakness: CWE-79

V. Comments for CVE-2025-6596

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