CVE-2025-31483: Miniflux Media Proxy vulnerable to Stored Cross-site Scripting due to improper Content-Security-Policy configuration

April 4, 2025 (updated October 31, 2025)

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.

References

github.com/advisories/GHSA-cq88-842x-2jhp
github.com/miniflux/v2
github.com/miniflux/v2/commit/cb695e653a08af4cabcb277c271ce74bd0c746e6
github.com/miniflux/v2/security/advisories/GHSA-cq88-842x-2jhp
nvd.nist.gov/vuln/detail/CVE-2025-31483

Code Behaviors & Features

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