The Joomla extension JMedia is vulnerable to a stored XSS vulnerability. Unsanitised SVG uploads served without nosniff, leading to stored/reflected XSS.

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

• REF_URL_NOT_ALLOWLISTED url not in allowlist: https://www.themexpert.com/joomla-extensions/joomla-media-manager