Stored XSS in Miniflux Media Proxy due to improper Content-Security-Policy configuration
Summary
Stored XSS in Miniflux Media Proxy due to improper Content-Security-Policy configuration
Original description
The description as published by the source.
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: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2025-31483 miniflux
- Ubuntu UBUNTU-CVE-2025-31483 miniflux
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com