{"id":"CVE-2021-34364","aliases":["EUVD-2021-21023","GHSA-h8gx-qmvv-cjw4"],"status":"published","title":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE...","description":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00685,"percentile":0.52925,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-06-09T10:54:59Z","modified":"2026-10-20T10:54:48Z","products":[{"vendor":"refined-github_project","product":"refined-github"}],"references":[{"url":"https://vuln.ryotak.me/advisories/47","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/sindresorhus/refined-github/releases/tag/21.6.8","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34364"},{"url":"https://github.com/advisories/GHSA-h8gx-qmvv-cjw4"}],"sources":{"cve":[{"id":"CVE-2021-34364","description":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.","status":"published","published":"2021-06-09T10:54:59Z","modified":"2024-08-04T00:12:49.958Z","updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21023","description":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.","status":"published","published":"2021-06-09T10:54:59Z","modified":"2024-08-04T00:12:49Z","updated_at":"2026-11-03T03:24:32.445199Z"}],"ghsa":[{"id":"GHSA-h8gx-qmvv-cjw4","title":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE...","description":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.","status":"published","published":"2022-05-24T19:04:41Z","modified":"2023-01-29T05:06:58Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:07.768849Z"}],"nvd":[{"id":"CVE-2021-34364","description":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.","status":"published","published":"2021-06-09T11:15:07.583Z","modified":"2026-06-17T03:55:43.683Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:54.439974Z"}],"osv":[{"id":"CVE-2021-34364","description":"The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.","status":"published","published":"2021-06-09T11:15:07.583Z","modified":"2026-10-20T10:54:48.29044399Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:20.13324Z"}]}}