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CVE-2026-52854— mediawiki/maps: Stored XSS through the overlays parameter in the display_map parser function

Quick assessment

Affected
ProfessionalWiki Maps
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Maps 是一个 MediaWiki 扩展插件，它通过动态嵌入地图实现对地理数据的可视化。在版本 12.1.3 之前，Leaflet 服务中的 解析器函数允许攻击者在 参数中传入受控的 HTML 内容，而 在使用叠加层名称作为 Leaflet 图层控制面板标签时未进行转义处理。具有编辑权限的 wiki 用户可以存储恶意的 wikitext，当其他用户预览或查看受影响地图时，会触发脚本执行。该脚本在查看用户的浏览器会话中运行，并可以访问该用户可用的数据或执行相关操作。此问题已在版本 12.1.3 中得到修复。

CVSS 8.6 · High EPSS 0.43% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
ProfessionalWiki Maps < 12.1.3 affected
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I. Basic Information for CVE-2026-52854

Vulnerability Information
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Vulnerability Title
mediawiki/maps: Stored XSS through the overlays parameter in the display_map parser function
Source: CVE Program / CVE List V5
Vulnerability Description
Maps is a MediaWiki extension that enables visualization of geographic data through dynamic embedded maps. Prior to version 12.1.3, the display_map parser function in the Leaflet service accepts attacker-controlled HTML in the overlays parameter, and resources/leaflet/jquery.leaflet.js uses the overlay name as a Leaflet layer-control label without escaping it. A wiki user with the edit permission can store malicious wikitext that causes script execution when another user previews or views the affected map. The script executes in the viewing user's browser session and can access data or perform actions available to that user. This issue is fixed in version 12.1.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A: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

Affected Products

Vendor Product Affected Versions CPE Subscribe
ProfessionalWiki Maps < 12.1.3 -

II. Public POCs for CVE-2026-52854

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7888 chars
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III. Intelligence Information for CVE-2026-52854

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Patches & Fixes for CVE-2026-52854 (3)

Vendor Advisories for CVE-2026-52854 (1)

IV. Related Vulnerabilities

Same product: Maps
Same weakness: CWE-79

V. Comments for CVE-2026-52854

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