CVE-2026-77609
MediumCVSS 6.1Summary
Prior to version 7.2.0, Semantic MediaWiki's Special:URIResolver redirects to a URL derived from the subpage without validating the target, allowing an open redirect to an off-host destination, potentially embedding credentials.
Risk Assessment
An attacker can abuse the trusted wiki domain for phishing, redirecting victims to malicious sites, potentially leading to data theft or malware installation.
Recommendation
Upgrade Semantic MediaWiki to version 7.2.0, which contains the fix.
Other vulnerabilities in Semantic MediaWiki
See all- CVE-2026-77616Medium
Semantic MediaWiki versions 7.0.0 through 7.1.0 contain a reflected XSS vulnerability in Special:Ask. The 'cursor' parameter is unsigned and fully attacker-controlled; insufficient validation leads to raw HTML injection into the page.
- CVE-2026-77610Medium
Prior to version 7.2.0, query debug output (format=debug or the 'debug' parameter on Special:Ask) in Semantic MediaWiki is assembled as raw HTML without proper output-context encoding, leading to reflected XSS.
- CVE-2026-77608Medium
Prior to version 7.2.0, Semantic MediaWiki reflects the 'value' parameter in rendered output and error messaging paths without sufficient output-context encoding, allowing reflected XSS.
- CVE-2026-77607Medium
Prior to version 7.2.0, Semantic MediaWiki inserts the separator (parameter 'sep') verbatim into HTML cell joins, allowing HTML injection and potentially XSS.
- CVE-2026-77606Medium
Prior to version 7.2.0, when headers=plain is set, Semantic MediaWiki emits table header text into <th> via a raw HTML path. User-controlled 'mainlabel' content can become executable HTML.
- CVE-2025-61682High
Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Versions starting in 3.1.0 and prior to 7.0.0 insert the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Version 7.0.0 patches the issue.
Original NVD description (English source)
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.