{"id":"CVE-2023-2534","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-2534","generatedAt":"2026-10-27T21:08:26.385Z","title":"Improper Authorization vulnerability in OTRS AG OTRS 8 (Websocket API backend) allows any as Agent authenticated attacker to track user behaviour and to gain live insight into overall system usage.","description":"Improper Authorization vulnerability in OTRS AG OTRS 8 (Websocket API backend) allows any as Agent authenticated attacker to track user behaviour and to gain live insight into overall system usage. User IDs can easily be correlated with real names e. g. via\nticket histories by any user. (Fuzzing for garnering other adjacent user/sensitive data). Subscribing to all possible push events could also lead to performance implications on the server side, depending on the size of the installation\nand the number of active users. (Flooding)This issue affects OTRS: from 8.0.X before 8.0.32.\n\n","published":"2023-05-08T08:15:44.000Z","lastModified":"2026-06-17T05:52:48.000Z","status":"Modified","sourceIdentifier":"security@otrs.com","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"},"cwe":["CWE-285","CWE-863"],"affected":["otrs/otrs"],"epss":{"score":0.00526,"percentile":0.44274,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://otrs.com/release-notes/otrs-security-advisory-2023-03/","tags":["Vendor Advisory"],"source":"security@otrs.com"},{"url":"https://otrs.com/release-notes/otrs-security-advisory-2023-03/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-2534","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}