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 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.

Affected Software

Weaknesses

• CWE-862: Missing Authorization

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: total

References

• https://blog.lexfo.fr/casse-spip-sqli-to-rce.html
• https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-18.html
• https://www.vulncheck.com/advisories/spip-missing-authorization-via-ecrire-action-editer-auteur

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