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CVE-2026-77609

Semantic MediaWiki has an open redirect in Special:URIResolver

CVSS 3.1 6.1 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-77609

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-77609

Published

SemanticMediaWiki

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "SemanticMediaWiki",
                    "product": "SemanticMediaWiki",
                    "versions": [
                        {
                            "version": "< 7.2.0",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON