{"id":"CVE-2021-42761","aliases":["EUVD-2021-29719","GHSA-hxmr-8629-frhp"],"status":"published","title":"A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb...","description":"A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.","severity":{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01465,"percentile":0.74022,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-384"],"published":"2023-02-16T18:05:36Z","modified":"2026-06-17T04:10:05Z","products":[{"vendor":"fortinet","product":"fortiweb"}],"references":[{"url":"https://fortiguard.com/psirt/FG-IR-21-214","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42761"},{"url":"https://github.com/advisories/GHSA-hxmr-8629-frhp"}],"sources":{"cve":[{"id":"CVE-2021-42761","description":"A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.","status":"published","published":"2023-02-16T18:05:36.868Z","modified":"2024-10-23T14:50:09.331Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29719","description":"A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.","status":"published","published":"2023-02-16T18:05:36Z","modified":"2024-10-23T14:50:09Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"high"}],"updated_at":"2026-11-03T00:05:21.424716Z"}],"ghsa":[{"id":"GHSA-hxmr-8629-frhp","title":"A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb...","description":"A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.","status":"published","published":"2023-02-16T21:30:27Z","modified":"2023-03-04T05:08:14Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:54:16.644116Z"}],"nvd":[{"id":"CVE-2021-42761","description":"A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.","status":"published","published":"2023-02-16T19:15:11.603Z","modified":"2026-06-17T04:10:05.793Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:07:07.323379Z"}]}}