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CVE-2026-77609— Semantic MediaWiki has an open redirect in Special:URIResolver

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， 会将用户控制的子页面解析为 MediaWiki 标题，并发出指向 的 HTTP 303 重定向，且未对解析后的目标进行验证。一个精心构造的子页面可以让该目标指向非本主机（off-host）：例如，通过 interwiki 前缀可以重定向到外部 Wiki（如 ，解码后为 ，会重定向到 ）；此外，由于解析后的 URL 可以携带凭据（ ），攻击者还可以通过该 URL 嵌

CVSS 6.1 · Medium EPSS 0.27% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
SemanticMediaWiki SemanticMediaWiki < 7.2.0 affected
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I. Basic Information for CVE-2026-77609

Vulnerability Information
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Vulnerability Title
Semantic MediaWiki has an open redirect in Special:URIResolver
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, `Special:URIResolver` resolves its user-controlled subpage to a MediaWiki title and issues an HTTP 303 redirect to `$title->getFullURL()` without validating the resolved target. A crafted subpage can make that target point off-host: an interwiki prefix redirects to the foreign wiki (for example `Special:URIResolver/mw-3AFoo`, which decodes to `mw:Foo`, redirects to `https://www.mediawiki.org/wiki/Foo`), and where the resolved URL carries an authority the target can even embed `user:pass@host` credentials. The result is an open redirect to an attacker-influenced host, usable for phishing from a trusted wiki URL. 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
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SemanticMediaWiki SemanticMediaWiki < 7.2.0 -

II. Public POCs for CVE-2026-77609

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III. Intelligence Information for CVE-2026-77609

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Other References for CVE-2026-77609 (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-2026-77606 6.1 MEDIUM Semantic MediaWiki has reflected XSS in Special:Ask plain table headers
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-601