{"id":"GHSA-cq88-842x-2jhp","summary":"Miniflux Media Proxy vulnerable to Stored Cross-site Scripting 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 \u003e= 2.2.7\n\n## Credit\n[RyotaK](https://ryotak.net) (GMO Flatt Security Inc.) with [takumi-san.ai](https://takumi-san.ai)","aliases":["CVE-2025-31483","GO-2025-3591"],"modified":"2025-04-09T17:41:53.983252Z","published":"2025-04-04T14:09:40Z","database_specific":{"cwe_ids":["CWE-79"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2025-04-04T14:09:40Z","nvd_published_at":"2025-04-03T18:15:47Z"},"references":[{"type":"WEB","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":"WEB","url":"https://github.com/miniflux/v2/commit/cb695e653a08af4cabcb277c271ce74bd0c746e6"},{"type":"PACKAGE","url":"https://github.com/miniflux/v2"}],"affected":[{"package":{"name":"miniflux.app/v2","ecosystem":"Go","purl":"pkg:golang/miniflux.app/v2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.2.7"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/04/GHSA-cq88-842x-2jhp/GHSA-cq88-842x-2jhp.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"}]}