{"id":"CVE-2025-71402","revision":"01885eab6f4549aca9b430583cc377be","records":[{"revision":"01885eab6f4549aca9b430583cc377be","observedAt":"2026-10-25T04:17:18.34+00:00","statement":{"source":"nvd","id":"CVE-2025-71402","aliases":[],"title":"better-auth versions greater than 1.3.34 and before 1.4.0 contain a vulnerability in the multi-session plugin's /sign-out after-hook, which trusts raw multi-session cookies and forwards extracted values to internalAdapter.deleteSessions wit…","description":"better-auth versions greater than 1.3.34 and before 1.4.0 contain a vulnerability in the multi-session plugin's /sign-out after-hook, which trusts raw multi-session cookies and forwards extracted values to internalAdapter.deleteSessions without verifying the cookie signature (e.g., via getSignedCookie). An attacker can supply a forged _multi-* cookie to trigger deletion of arbitrary session tokens.","state":0,"publishedAt":"2026-08-01T13:16:55.51+00:00","modifiedAt":"2026-10-06T22:10:00.247+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/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","score":2,"severity":"LOW"}],"references":["https://github.com/better-auth/better-auth/security/advisories/GHSA-wmjr-v86c-m9jj","https://www.vulncheck.com/advisories/better-auth-before-session-revocation-via-forged-cookie"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-71402","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-347"],"productCriteria":[],"sourceDates":{"published":"2026-08-01T13:16:55.510","lastModified":"2026-10-06T22:10:00.247"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2025-71402","identifiers":["CVE-2025-71402"]},"retained":false,"historicalAffected":[]}],"coverage":[]}