{"id":"CVE-2026-104733","aliases":["DEBIAN-CVE-2026-104733","EUVD-2026-91582","GHSA-339c-8fr4-g2w4","UBUNTU-CVE-2026-104733"],"status":"published","title":"User Impersonation/Authorization Bypass in XMPP Server ejabberd","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","severity":{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00215,"percentile":0.12073,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-290"],"published":"2026-10-02T12:19:10Z","modified":"2026-10-28T02:31:08Z","fixes":[{"ecosystem":"Debian:14","package":"ejabberd","fixed_in":["26.07-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["23.01-1","23.10-1","23.10-1~bpo12+1","24.07-1","24.07-2","24.12-1","24.12-2","24.12-3","24.12-3~bpo12+1","24.12-4","26.02-1","26.07-1"]},{"source":"osv","ecosystem":"Debian:13","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["24.12-3","24.12-3+deb13u1","24.12-3+deb13u2","24.12-4","26.02-1","26.07-1"]},{"source":"osv","ecosystem":"Debian:14","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"26.07-1"}]}],"versions":["24.12-3","24.12-4","26.02-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["15.03-2","15.10-3","16.01-1","16.01-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["17.07-1","17.08-3","17.11-1","18.01-1","18.01-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["19.08-2","19.09.1-1","20.01-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["21.01-2","21.07-1","21.12-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["23.01-1","23.10-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["24.12-4","26.02-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["24.12-3","24.12-4"]}],"products":[{"vendor":"processone","product":"ejabberd"}],"references":[{"url":"https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/","tags":["third-party-advisory","advisory","report"]},{"url":"https://github.com/processone/ejabberd/releases#release-26.07","tags":["release-notes","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104733","tags":["advisory"]},{"url":"https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004"},{"url":"https://github.com/advisories/GHSA-339c-8fr4-g2w4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104733.json","tags":["advisory"]},{"url":"https://github.com/processone/ejabberd","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-104733","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-104733","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-104733","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-104733","title":"User Impersonation/Authorization Bypass in XMPP Server ejabberd","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","status":"published","published":"2026-10-02T12:19:10.635Z","modified":"2026-10-02T16:57:18.308Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P","level":"high","assessor":"cna"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T14:20:09.448255Z"}],"euvd":[{"id":"EUVD-2026-91582","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","status":"published","published":"2026-10-02T12:19:10Z","modified":"2026-10-02T16:57:18Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P","level":"high"}],"updated_at":"2026-11-02T17:27:42.349288Z"}],"ghsa":[{"id":"GHSA-339c-8fr4-g2w4","title":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate...","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","status":"published","published":"2026-10-02T15:31:23Z","modified":"2026-10-02T18:31:24Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T15:12:43.646433Z"}],"nvd":[{"id":"CVE-2026-104733","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","status":"published","published":"2026-10-02T13:17:45.01Z","modified":"2026-10-02T17:59:09.43Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T14:12:53.41762Z"}],"osv":[{"id":"CVE-2026-104733","title":"User Impersonation/Authorization Bypass in XMPP Server ejabberd","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","status":"published","published":"2026-10-02T12:19:10.635Z","modified":"2026-10-28T02:31:08.66763782Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P","level":"high"}],"updated_at":"2026-11-02T15:44:54.236592Z"},{"id":"DEBIAN-CVE-2026-104733","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","status":"published","published":"2026-10-02T13:17:45.01Z","modified":"2026-10-03T05:00:16.037048119Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:45:48.903138Z"},{"id":"UBUNTU-CVE-2026-104733","description":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","status":"published","published":"2026-10-02T13:17:00Z","modified":"2026-10-17T12:58:43.073400295Z","cvss":[{"version":"4.0","score":7.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P","level":"high"}],"updated_at":"2026-11-02T16:55:59.130573Z"}]}}
