CVE-2026-103050— Stored i18n XSS in MassMessage
Quick assessment
Affected
The Wikimedia Foundation Mediawiki - MassMessage 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.
在网页生成过程中，对输入的处理不当导致“跨站脚本”（XSS）漏洞。Wikimedia 基金会 Mediawiki 的 MassMessage 扩展程序中存在存储型 XSS 漏洞。 此问题影响 Mediawiki 的 MassMessage 扩展程序，包括以下版本之前（不含）的版本：1.46.1、1.45.5、1.43.10。
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-103050
Vulnerability Information
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Vulnerability Title
Stored i18n XSS in MassMessage
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS.
This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.
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
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| The Wikimedia Foundation | Mediawiki - MassMessage extension | 0 ~ 1.46.1, 1.45.5, 1.43.10 | - |
|
II. Public POCs for CVE-2026-103050
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-103050 (2)
-
https://phabricator.wikimedia.org/T432341 issue-tracking
-
https://gerrit.wikimedia.org/r/c/1346089 mitigation
Same Patch Batch · The Wikimedia Foundation · 2026-09-29 · 8 CVEs total
| CVE-2026-103046 | WikifunctionsFragmentRenderer does unsafe string replacements on user-provided HTML | |
| CVE-2026-103044 | EasyTimeline should not serve image maps as application/xml | |
| CVE-2026-103047 | XSS through i18n message in CentralAuth | |
| CVE-2026-103045 | XSS in Refreshed skin | |
| CVE-2026-103048 | Open Redirect in Special:Book | |
| CVE-2026-103049 | XSS in Cargo's Special:CargoQuery page due to unsanitized table headers | |
| CVE-2026-103051 | Stored i18n XSSs in CentralNotice |
IV. Related Vulnerabilities
Same vendor: The Wikimedia Foundation
Same weakness: CWE-79
V. Comments for CVE-2026-103050
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