CVE-2025-31483: Miniflux v2

Medium severity, CVSS 4.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Miniflux is a feed reader. Due to a weak Content Security Policy on the /proxy/* route, an attacker can bypass the CSP of the media proxy and execute cross-site scripting when opening external images in a new tab/window. To mitigate the vulnerability, the CSP for the media proxy has been changed from default-src 'self' to default-src 'none'; form-action 'none'; sandbox;. This vulnerability is fixed in 2.2.7.

Affected products

• Miniflux v2: before 2.2.7 (fixed in 2.2.7)

Published 2025-04-03. Last modified 2026-06-17.