What’s Vulnerable › Vulnerabilities

CVE-2026-72709: SPIP < 4.4.18 Missing Authorization via ecrire/action/

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-09-15
• Weakness: CWE-862

Description

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.

Affected products

• SPIP: before 4.4.18 — fixed in 4.4.18

How to fix

Upgrade to a fixed version: SPIP 4.4.18. Check the vendor advisory for mitigations.

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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