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.

Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-hw3m-8j5x-94ff Semantic MediaWiki has an open redirect in Special:URIResolver
Fixes

Solution

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Workaround

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History

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
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.
Title Semantic MediaWiki has an open redirect in Special:URIResolver
Weaknesses CWE-601
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-18T16:52:16.291Z

Reserved: 2026-08-20T20:48:20.508Z

Link: CVE-2026-77609

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-18T17:17:01.270

Modified: 2026-09-18T17:17:01.270

Link: CVE-2026-77609

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses