{"id":"CVE-2025-13173","kind":"vulnerability","aliases":["CVE-2025-13173"],"related":[],"title":"Session-bound tokens survive logout unless token revocation option is enabled","description":"Tokens associated with user sessions are not revoked when the corresponding user session is terminated, unless another SSO request is initiated. This occurs when the session-bound token feature is enabled with token binding validation and the \"Revoke token upon user logout\" option is not active. The software fails to automatically invalidate session-bound tokens upon user session termination.\n\nThis vulnerability exists when token binding validation is enabled. As a result, a malicious actor possessing a valid session-bound token could exploit this condition to maintain unauthorized access to applications and resources even after the associated user session has ended, potentially leading to the exposure of sensitive user data.","summary":"When session-bound token binding validation is enabled, tokens tied to a user session are not revoked when that session ends, unless another SSO request is made. An attacker holding such a token can keep accessing applications and resources after the user has logged out, potentially exposing sensitive user data.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["other","session-management","sso"],"not_affected_if":["default-config"],"how_to_check":"- Check whether session-bound token feature with token binding validation is enabled in the SSO product configuration: unknown\n- Check whether the \"Revoke token upon user logout\" option is active: unknown","fix":null,"status":"open","published_at":"2026-10-19T17:16:59+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","triaged_at":"2026-10-25T03:55:53+00:00","updated_at":"2026-10-25T03:55:53+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-10-25T03:55:53Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"Session-bound tokens survive logout unless token revocation option is enabled","impact":"medium","summary":"When session-bound token binding validation is enabled, tokens tied to a user session are not revoked when that session ends, unless another SSO request is made. An attacker holding such a token can keep accessing applications and resources after the user has logged out, potentially exposing sensitive user data.","category":"other","nicknames":[],"who_cares":["sso","session-management"],"confidence":0.4,"needs_auth":"yes","worst_case":"Attacker keeps access to applications after user logout","analyst_note":"Identify the affected product and versions and the vendor fix from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2025-13173.","how_to_check":"- Check whether session-bound token feature with token binding validation is enabled in the SSO product configuration: unknown\n- Check whether the \"Revoke token upon user logout\" option is active: unknown","needs_analyst":true,"not_affected_if":["default-config"],"who_is_affected":"Teams running the affected SSO product with session-bound tokens and token binding validation turned on, where the \"Revoke token upon user logout\" option is not active. Systems without token binding validation are described as not exposed by this description. The sources do not name the product or vendor version.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000591,"input_tokens":3414,"output_tokens":500,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-13173':15A,18A '-2025':14A,17A 'access':60B,165C 'activ':121C 'actor':150C 'anoth':47B,91C 'applic':61B,167C 'associ':76C,173C 'attack':53B 'automat':126C 'bind':29B,109C,141C 'bound':3A,27B,102C,130C,156C 'condit':161C 'correspond':85C 'could':158C 'cve':13A,16A 'data':74B,186C 'enabl':12A,32B,106C,144C 'end':45B,177C 'even':170C 'exist':138C 'exploit':159C 'expos':71B 'exposur':182C 'fail':124C 'featur':104C 'hold':54B 'initi':95C 'invalid':127C 'keep':59B 'lead':179C 'log':68B 'logout':6A,117C 'made':51B 'maintain':163C 'malici':149C 'manag':22B 'occur':97C 'option':10A,118C 'possess':151C 'potenti':70B,178C 'request':49B,93C 'resourc':63B,169C 'result':147C 'revoc':9A 'revok':41B,82C,113C 'sensit':72B,184C 'session':2A,21B,26B,38B,44B,79C,87C,101C,129C,134C,155C,175C 'session-bound':1A,25B,100C,128C,154C 'session-manag':20B 'softwar':123C 'sso':23B,48B,92C 'surviv':5A 'termin':89C,135C 'tie':34B 'token':4A,8A,28B,33B,57B,75C,103C,108C,114C,131C,140C,157C 'unauthor':164C 'unless':7A,46B,90C 'upon':115C,132C 'user':37B,66B,73B,78C,86C,116C,133C,174C,185C 'valid':30B,110C,142C,153C 'vulner':137C","nicknames":[],"mitigations":[],"who_affected":"Teams running the affected SSO product with session-bound tokens and token binding validation turned on, where the \"Revoke token upon user logout\" option is not active. Systems without token binding validation are described as not exposed by this description. The sources do not name the product or vendor version.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-19T17:16:59+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L","cvss_by":"ed10eef1-636d-4fbe-9993-6890dfa878f8","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2025-13173","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-13173","severity":null,"published_at":"2026-10-19T17:16:59+00:00","modified_at":"2026-10-20T20:17:10+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","fetched_at":"2026-10-23T22:28:57+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}