{"schemaVersion":3,"id":"CVE-2026-112329","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The Sensei LMS WordPress plugin before 4.26.4 contains a broken access control vulnerability in the legacy save_new_message handler hooked on the init action, which validates only a generic nonce without verifying course enrollment or restricting post_id to valid post types. Authenticated attackers, including unprivileged Subscribers, can supply an arbitrary post_id for any course, lesson, or quiz to create a private message addressed to that post's author, bypassing the enrollment checks enforced by the newer REST send-message controller.","dates":{"published":"2026-10-19T14:45:24.844Z","modified":"2026-10-19T14:45:24.844Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0018,"percentile":0.07231,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-20T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0018,"percentile":0.07231}],"last30":[{"date":"2026-10-20T00:00:00.000Z","score":0.0018,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0018,"percentile":0.07231}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-862","name":"Missing Authorization","description":"The product does not perform an authorization check when an actor attempts to access a resource or perform an action.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/862.html"}],"affected":[{"vendor":"automattic","product":"sensei lms","name":"Sensei LMS","label":"sensei lms","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 4.26.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.26.4","eol":null,"hubHref":"/vendor/automattic/sensei_lms"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://senseilms.com/release-notes/","label":"senseilms.com/release-notes/","hostname":"senseilms.com","tags":["Release Notes","Patch"]},{"url":"https://www.vulncheck.com/advisories/sensei-lms-broken-access-control-via-save-new-message","label":"www.vulncheck.com/advisories/sensei-lms-broken-access-control-via-save-new-message","hostname":"www.vulncheck.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-19T14:45:24.844Z","label":"Published","detail":"Vulnerability first disclosed.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T17:49:44.298Z","stale":false,"partial":false}}