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CVE-2026-77606— Semantic MediaWiki has reflected XSS in Special:Ask plain table headers

Quick assessment

Affected
SemanticMediaWiki SemanticMediaWiki
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.

Semantic MediaWiki 是 MediaWiki 的一个免费开源扩展，允许用户在 wiki 页面中存储和查询数据。在 7.2.0 版本之前，当设置 时，表格标题文本会通过原始 HTML 路径输出到 标签中。因此，用户可控的 内容可能会变成可执行的 HTML（存在 HTML 注入风险）。该问题已在 7.2.0 版本中修复。

CVSS 6.1 · Medium EPSS 0.26% · P18

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
SemanticMediaWiki SemanticMediaWiki < 7.2.0 affected
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I. Basic Information for CVE-2026-77606

Vulnerability Information
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Vulnerability Title
Semantic MediaWiki has reflected XSS in Special:Ask plain table headers
Source: CVE Program / CVE List V5
Vulnerability Description
Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Prior to version 7.2.0, when `headers=plain`, table header text was emitted into `<th>` via a raw HTML path. User-controlled `mainlabel` content could therefore become executable HTML. Version 7.2.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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

Affected Products

Vendor Product Affected Versions CPE Subscribe
SemanticMediaWiki SemanticMediaWiki < 7.2.0 -

II. Public POCs for CVE-2026-77606

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III. Intelligence Information for CVE-2026-77606

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Other References for CVE-2026-77606 (2)

Same Patch Batch · SemanticMediaWiki · 2026-09-18 · 7 CVEs total

CVE-2025-61682 8.6 HIGH Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reser
CVE-2026-77609 6.1 MEDIUM Semantic MediaWiki has an open redirect in Special:URIResolver
CVE-2026-77607 6.1 MEDIUM Semantic MediaWiki affected by Special:Ask table `sep` parameter reflected XSS
CVE-2026-77608 6.1 MEDIUM Semantic MediaWiki has reflected XSS in `Special:SearchByProperty` (`property` and `value`
CVE-2026-77616 6.1 MEDIUM Semantic MediaWiki affected by reflected XSS in `Special:Ask` via a forged cursor paginati
CVE-2026-77610 6.1 MEDIUM Semantic MediaWiki has a query debug output XSS (`DebugFormatter`)

IV. Related Vulnerabilities

Same product: SemanticMediaWiki
Same vendor: SemanticMediaWiki
Same weakness: CWE-79