{"id":"CVE-2026-72709","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-72709","summary":"SPIP before 4.4.18 contains a missing authorization vulnerability in the administrative action endpoints under ecrire/action/ that allows unauthenticated attackers to perform privileged…","details":"SPIP before 4.4.18 contains a missing authorization vulnerability in the administrative action endpoints under ecrire/action/ that allows unauthenticated attackers to perform privileged actions by supplying a valid HMAC-SHA256 nonce without any server-side permission check via autoriser(). Attackers can obtain a valid nonce, compute it for any action as the anonymous user, and invoke the editer_auteur action directly over HTTP to reset the password of any user account, including the administrator.","published":"2026-09-11T17:18:58.760","modified":"2026-09-11T17:18:58.760","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://blog.lexfo.fr/casse-spip-sqli-to-rce.html"},{"type":"WEB","url":"https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-18.html"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/spip-missing-authorization-via-ecrire-action-editer-auteur"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-11T17:18:58.760"}}