CVE-2025-62698— Stored XSS through system messages in ExternalGuidance
Quick assessment
Affected
The Wikimedia Foundation Mediawiki - ExternalGuidance
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.
MediaWiki - ExternalGuidance Extension是MediaWiki开源的一个用于提供外部指导链接或资源的扩展。 MediaWiki - ExternalGuidance Extension存在安全漏洞，该漏洞源于网页生成期间输入中和不当，可能导致存储型跨站脚本攻击。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-62698
Vulnerability Information
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Vulnerability Title
Stored XSS through system messages in ExternalGuidance
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - ExternalGuidance allows Stored XSS.This issue affects Mediawiki - ExternalGuidance: from master before 1.39.
Source: CVE Program / CVE List V5
CVSS Information
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
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
MediaWiki - ExternalGuidance Extension 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MediaWiki - ExternalGuidance Extension是MediaWiki开源的一个用于提供外部指导链接或资源的扩展。 MediaWiki - ExternalGuidance Extension存在安全漏洞，该漏洞源于网页生成期间输入中和不当，可能导致存储型跨站脚本攻击。
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 |
|---|---|---|---|---|
| The Wikimedia Foundation | Mediawiki - ExternalGuidance | master ~ 1.39 | - |
|
II. Public POCs for CVE-2025-62698
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · The Wikimedia Foundation · 2025-10-20 · 7 CVEs total
| CVE-2025-62658 | SQL injection in WatchAnalytics through Special:ClearPendingReviews | |
| CVE-2025-62657 | Stored XSS through system messages in PageForms | |
| CVE-2025-62656 | GlobalBlocking Special:GlobalBlockList vulnerable to message key stored XSS | |
| CVE-2025-62697 | Improperly sanitized style parameter in LanguageSelector | |
| CVE-2025-62700 | Stored XSS through a system message in MultiBoilerplate | |
| CVE-2025-62693 | Stored XSS through system messages in LastModified |
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V. Comments for CVE-2025-62698
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