{"id":"CVE-2021-41767","aliases":["BIT-guacamole-2021-41767","BIT-guacamole-server-2021-41767","EUVD-2021-28775","GHSA-8jvg-8759-x9j6","UBUNTU-CVE-2021-41767"],"status":"published","title":"Private tunnel identifier may be included in the non-private details of active connections","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01997,"percentile":0.80864,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2022-01-11T22:10:11Z","modified":"2026-10-24T10:30:50Z","fixes":[{"ecosystem":"Bitnami","package":"guacamole","fixed_in":["1.3.0"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"guacamole-server","fixed_in":["1.3.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"guacamole","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.3.0"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"guacamole-server","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"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/5l31k4jmzdsfz0xt8osrbl878gb3b7ro","tags":["x_refsource_MISC","x_transferred","Mailing List","Vendor Advisory","web","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2022/01/11/6","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","web","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41767"},{"url":"https://github.com/advisories/GHSA-8jvg-8759-x9j6"},{"url":"https://ubuntu.com/security/CVE-2021-41767","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-41767","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-41767","title":"Private tunnel identifier may be included in the non-private details of active connections","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2022-01-11T22:10:11Z","modified":"2024-08-04T03:15:29.36Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:32:59.105382Z"}],"euvd":[{"id":"EUVD-2021-28775","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2022-01-11T22:10:11Z","modified":"2024-08-04T03:15:29Z","updated_at":"2026-11-03T03:24:17.230256Z"}],"ghsa":[{"id":"GHSA-8jvg-8759-x9j6","title":"Exposure of Sensitive Information to an Unauthorized Actor in Apache Guacamole","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2022-02-15T01:44:28Z","modified":"2023-02-03T05:04:32Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:53:34.195392Z"}],"nvd":[{"id":"CVE-2021-41767","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2022-01-11T22:15:07.57Z","modified":"2026-06-17T04:08:53.227Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:07:03.418194Z"}],"osv":[{"id":"CVE-2021-41767","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2022-01-11T22:15:07.57Z","modified":"2026-10-24T10:30:50.241247144Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.557945Z"},{"id":"UBUNTU-CVE-2021-41767","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2022-01-11T22:15:00Z","modified":"2026-04-22T13:01:07.122624Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"BIT-guacamole-2021-41767","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2024-03-06T10:53:35.265Z","modified":"2024-03-06T11:25:28.861Z","updated_at":"2026-11-02T15:28:31.02759Z"},{"id":"BIT-guacamole-server-2021-41767","description":"Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.","status":"published","published":"2024-03-06T10:53:36.492Z","modified":"2024-03-06T11:25:28.861Z","updated_at":"2026-11-02T15:28:31.02759Z"}]}}