CVE-2025-31483 — Stored XSS in Miniflux Media Proxy due to improper Content-Security-Policy configuration
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 o…
Published: 2025-04-03 · CVSS: 4.8 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7