{"id":"CVE-2025-31483","aliases":["GHSA-cq88-842x-2jhp","GO-2025-3591"],"url":"https://o3.security/vulnerability/CVE-2025-31483","summary":"Stored XSS in Miniflux Media Proxy due to improper Content-Security-Policy configuration","details":"## Summary\n\nDue 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.\n\n## Impact\n\nA malicious feed added to Miniflux can execute arbitrary JavaScript in the user's browser when opening external resources, such as proxified images, in a new tab or window.\n\n## Mitigation\n\nThe CSP for the media proxy has been changed from `default-src 'self'` to `default-src 'none'; form-action 'none'; sandbox;`.\n\nUpgrade to Miniflux >= 2.2.7\n\n## Credit\n[RyotaK](https://ryotak.net) (GMO Flatt Security Inc.) with [takumi-san.ai](https://takumi-san.ai)","published":"2025-04-03T18:07:32.241Z","modified":"2026-08-12T03:51:25.086825587Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"miniflux.app/v2","fixedVersion":"2.2.7"}],"fix":{"url":"https://github.com/miniflux/v2/commit/cb695e653a08af4cabcb277c271ce74bd0c746e6","label":"miniflux/v2@cb695e6"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/31xxx/CVE-2025-31483.json"},{"type":"ADVISORY","url":"https://github.com/miniflux/v2/security/advisories/GHSA-cq88-842x-2jhp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-31483"},{"type":"FIX","url":"https://github.com/miniflux/v2/commit/cb695e653a08af4cabcb277c271ce74bd0c746e6"},{"type":"PACKAGE","url":"https://github.com/miniflux/v2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:25.086825587Z"}}