{"id":"CVE-2021-43999","aliases":["BIT-guacamole-2021-43999","BIT-guacamole-server-2021-43999","EUVD-2021-30858","GHSA-v83c-8hcj-4545","UBUNTU-CVE-2021-43999"],"status":"published","title":"Improper validation of SAML responses","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01843,"percentile":0.79331,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2022-01-11T22:10:12Z","modified":"2026-10-24T10:30:33Z","affected":[{"source":"osv","ecosystem":"Bitnami","package":"guacamole","ranges":[{"type":"SEMVER","events":[{"introduced":"1.2.0"},{"last_affected":"1.2.0"},{"introduced":"1.3.0"},{"last_affected":"1.3.0"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"guacamole-server","ranges":[{"type":"SEMVER","events":[{"introduced":"1.2.0"},{"last_affected":"1.2.0"},{"introduced":"1.3.0"},{"last_affected":"1.3.0"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"guacamole-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.3-1build2","0.8.3-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"guacamole-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.9-2","0.9.9-2build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"guacamole-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-1","1.3.0-1build1","1.3.0-1.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"guacamole-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-1.1","1.3.0-1.3ubuntu1"]}],"products":[{"vendor":"apache","product":"guacamole"},{"vendor":"apache software foundation","product":"apache guacamole"}],"references":[{"url":"https://lists.apache.org/thread/4dt9h5mo4o9rxlgxm3rp8wfqdtdjn2z9","tags":["x_refsource_MISC","x_transferred","Mailing List","Vendor Advisory","web","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2022/01/11/7","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","web","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43999"},{"url":"https://github.com/advisories/GHSA-v83c-8hcj-4545"},{"url":"https://ubuntu.com/security/CVE-2021-43999","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43999","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-43999","title":"Improper validation of SAML responses","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2022-01-11T22:10:12Z","modified":"2024-08-04T04:10:17.191Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30858","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2022-01-11T22:10:12Z","modified":"2024-08-04T04:10:17Z","updated_at":"2026-11-03T03:24:12.599691Z"}],"ghsa":[{"id":"GHSA-v83c-8hcj-4545","title":"Improper Authentication in Apache Guacamole","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2022-02-15T01:44:10Z","modified":"2023-02-03T05:04:32Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:53:34.195392Z"}],"nvd":[{"id":"CVE-2021-43999","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2022-01-11T22:15:07.627Z","modified":"2026-06-17T04:11:46Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6,"vector":"AV:N/AC:M/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:07:03.418194Z"}],"osv":[{"id":"CVE-2021-43999","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2022-01-11T22:15:07.627Z","modified":"2026-10-24T10:30:33.028606424Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"UBUNTU-CVE-2021-43999","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2022-01-11T22:15:00Z","modified":"2026-04-22T13:03:14.958932Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"BIT-guacamole-2021-43999","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2024-03-06T10:53:24.204Z","modified":"2024-03-06T11:25:28.861Z","updated_at":"2026-11-02T15:28:31.02759Z"},{"id":"BIT-guacamole-server-2021-43999","description":"Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.","status":"published","published":"2024-03-06T10:53:22.98Z","modified":"2024-03-06T11:25:28.861Z","updated_at":"2026-11-02T15:28:31.02759Z"}]}}