CVE-2026-104461: Yeswiki

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

YesWiki before 4.6.7 contains a stored cross-site scripting vulnerability in the Bazar FileField, which validates only the upload's file extension and never calls HtmlPurifierService::cleanFile, so SVG files are stored verbatim and served inline as image/svg+xml. Authenticated users can submit entries via POST /api/entries/{formId} with SVG files containing script that executes in the wiki origin when the file is opened, enabling administrator session or account compromise.

Affected products

• Yeswiki Yeswiki: before 4.6.7 (fixed in 4.6.7)

Published 2026-10-02. Last modified 2026-10-06.