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CVE-2026-126563— Semantic MediaWiki 2.4.0 before 7.4.1 Reflected XSS via Special:Ask Date Format

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 2.4.0 至 7.4.1 之前的版本中， 函数存在反射型跨站脚本（XSS）漏洞。该函数在生成自由格式的日期标题时，未对 HTML 内容进行转义。未经身份验证的攻击者可构造包含 HTML 标记的 URL（通过日期打印格式参数 ），从而在已登录受害者的浏览器会话中执行恶意脚本。

CVSS 6.1 · Medium
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I. Basic Information for CVE-2026-126563

Vulnerability Information
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Vulnerability Title
Semantic MediaWiki 2.4.0 before 7.4.1 Reflected XSS via Special:Ask Date Format
Source: CVE Program / CVE List V5
Vulnerability Description
Semantic MediaWiki 2.4.0 before 7.4.1 contains a reflected cross-site scripting vulnerability in TimeValueFormatter::getCaptionFromFreeFormat(), which emits free-format date captions in HTML without escaping. Unauthenticated attackers can craft a Special:Ask URL with HTML markup in a date printout format (#-F[...]) to execute script in a logged-in victim's browser session.
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 2.4.0 ~ 7.4.1 -

II. Public POCs for CVE-2026-126563

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-126563

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Other References for CVE-2026-126563 (5)

Same Patch Batch · SemanticMediaWiki · 2026-11-11 · 9 CVEs total

CVE-2026-126566 7.1 HIGH Semantic MediaWiki 7.3.1 before 7.4.1 Incorrect Authorization via Edit Protection Annotati
CVE-2026-126561 7.1 HIGH Semantic MediaWiki 2.5.0 before 7.4.1 Missing Authorization via Is edit protected Annotati
CVE-2026-126560 5.4 MEDIUM Semantic MediaWiki 3.0.0 before 7.4.1 Stored XSS via data-search Attributes
CVE-2026-126567 5.4 MEDIUM Semantic MediaWiki 3.0.0 before 7.4.1 Stored XSS via Special:Ask Debug Output
CVE-2026-126564 5.4 MEDIUM Semantic MediaWiki 2.5.0 before 7.4.1 Stored XSS via Special:Browse Factbox Title
CVE-2026-126559 4.8 MEDIUM Semantic MediaWiki 4.2.0 before 7.4.1 Stored XSS via Special:FacetedSearch
CVE-2026-126565 4.3 MEDIUM Semantic MediaWiki 3.0.0 before 7.4.1 DoS via Exponential Concept Expansion
CVE-2026-126562 4.3 MEDIUM Semantic MediaWiki 3.0.0 before 7.4.1 Uncontrolled Recursion via ElasticStore ConceptDescr

IV. Related Vulnerabilities

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