Semantic MediaWiki up to 7.1.x Special:URIResolver getFullURL redirect

Summaryinfo

A vulnerability classified as problematic has been found in Semantic MediaWiki up to 7.1.x. This affects the function getFullURL of the component Special:URIResolver. The manipulation leads to redirect. This vulnerability is documented as CVE-2026-77609. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Semantic MediaWiki up to 7.1.x and classified as problematic. This issue affects the function getFullURL of the component Special:URIResolver. The manipulation with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-77609 since 08/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1204.001 according to MITRE ATT&CK.

Upgrading to version 7.2.0 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Name

• Semantic MediaWiki

Version

• 7.0
• 7.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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• 🔒

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