CVE-2026-72709

CRITICAL 9.8

SPIP < 4.4.18 Missing Authorization via ecrire/action/

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

SPIP before version 4.4.18 contains a missing authorization vulnerability in sensitive actions under ecrire/action/ that allows unauthenticated attackers to invoke privileged actions by supplying only a valid CSRF nonce without any server-side permission check. Attackers can bypass template-level authorization guards through direct HTTP requests to invoke actions such as editer_auteur, enabling arbitrary account password rewrites including administrator accounts and resulting in full account takeover.

CWE	CWE-862
Vendor	spip
Product	spip
Published	Sep 11, 2026
Last Updated	Sep 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

SPIP / SPIP

0 < 4.4.18

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Franck Chevalier (Wayko)