{"action":"Upgrade better-auth to 1.1.21 or later.","affected":[{"fixed":"1.1.21","introduced":"0"}],"component":"better-auth","cve_ids":["CVE-2025-71403"],"ecosystem":"npm","epss":0.00342,"exploited":false,"fixed_versions":["1.1.21"],"ghsa_id":"GHSA-vp58-j275-797x","id":"tcs_01M5KGCGMPZAQ8SHM3SG6XB6MD","modified_at":"2026-08-02T03:56:47.282836883Z","published_at":"2025-02-24T20:49:50Z","references":["https://osv.dev/vulnerability/GHSA-vp58-j275-797x","https://github.com/better-auth/better-auth/security/advisories/GHSA-vp58-j275-797x","https://github.com/better-auth/better-auth/commit/b381cac7aafd6aa53ef78b6ab771ebfa24643c80","https://github.com/better-auth/better-auth","https://github.com/better-auth/better-auth/blob/ddebd0358d74376ea64541512d0167dd4377f182/packages/better-auth/src/api/middlewares/origin-check.ts#L53"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"GHSA-vp58-j275-797x","url":"https://osv.dev/vulnerability/GHSA-vp58-j275-797x"}],"summary":"Better Auth allows bypassing the trustedOrigins Protection which leads to ATO"}