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CVE-2025-53490— Multiple XSS in CampaignEvents

Quick assessment

Affected
Wikimedia Foundation Mediawiki - CampaignEvents Extension
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 Mediawiki CampaignEvents Extension是Wikimedia基金会的一个用于维基项目的扩展。 Wikimedia Mediawiki CampaignEvents Extension 1.43.2之前1.43.x版本存在安全漏洞，该漏洞源于输入中和不当，可能导致跨站脚本攻击。

AI Predicted 4.3 Difficulty: Easy EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2025-53490

Vulnerability Information
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Vulnerability Title
Multiple XSS in CampaignEvents
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 Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - CampaignEvents Extension: from 1.43.X before 1.43.2.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 Mediawiki CampaignEvents Extension 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wikimedia Mediawiki CampaignEvents Extension是Wikimedia基金会的一个用于维基项目的扩展。 Wikimedia Mediawiki CampaignEvents Extension 1.43.2之前1.43.x版本存在安全漏洞，该漏洞源于输入中和不当，可能导致跨站脚本攻击。
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
Wikimedia Foundation Mediawiki - CampaignEvents Extension 1.43.x ~ 1.43.2 -

II. Public POCs for CVE-2025-53490

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III. Intelligence Information for CVE-2025-53490

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Other References for CVE-2025-53490 (1)

Same Patch Batch · Wikimedia Foundation · 2025-07-03 · 6 CVEs total

CVE-2025-6926 Security Authentication Bypass in CentralAuth
CVE-2025-53501 Content Access Bypass in Scribunto
CVE-2025-53489 XSS in GoogleDocs4MW
CVE-2025-53502 HTML injection in FeaturedFeeds
CVE-2025-53500 Stored XSS in MassEditRegex

IV. Related Vulnerabilities

Same product: Mediawiki - CampaignEvents Extension
Same vendor: Wikimedia Foundation
Same weakness: CWE-79

V. Comments for CVE-2025-53490

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