{"id":"CVE-2021-31903","aliases":["EUVD-2021-18778","GHSA-474g-w58m-p2m4"],"status":"published","title":"In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently,...","description":"In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently, leading to XSS.","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":"2026-11-11","score":0.00778,"percentile":0.56321,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-05-11T11:37:43Z","modified":"2026-06-17T03:52:27Z","products":[{"vendor":"jetbrains","product":"youtrack"}],"references":[{"url":"https://blog.jetbrains.com","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31903"},{"url":"https://github.com/advisories/GHSA-474g-w58m-p2m4"}],"sources":{"cve":[{"id":"CVE-2021-31903","description":"In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently, leading to XSS.","status":"published","published":"2021-05-11T11:37:43Z","modified":"2024-08-03T23:10:31.038Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18778","description":"In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently, leading to XSS.","status":"published","published":"2021-05-11T11:37:43Z","modified":"2024-08-03T23:10:31Z","updated_at":"2026-11-03T03:24:37.97373Z"}],"ghsa":[{"id":"GHSA-474g-w58m-p2m4","title":"In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently,...","description":"In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently, leading to XSS.","status":"published","published":"2022-05-24T19:02:09Z","modified":"2023-01-29T05:06:40Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:04.961867Z"}],"nvd":[{"id":"CVE-2021-31903","description":"In JetBrains YouTrack before 2021.1.9819, a pull request's title was sanitized insufficiently, leading to XSS.","status":"published","published":"2021-05-11T12:15:07.903Z","modified":"2026-06-17T03:52:27.647Z","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":"2026-11-02T14:06:53.343329Z"}]}}