---
id: CVE-2026-72709
title: >-
  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
  serve…
summary: >-
  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
  serve…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
vendor: SPIP
product: SPIP
affected:
  - SPIP < 4.4.18
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T03:17:05.813'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72709'
references:
  - url: 'https://blog.lexfo.fr/casse-spip-sqli-to-rce.html'
    label: disclosure@vulncheck.com
  - url: >-
      https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-4-18.html
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/spip-missing-authorization-via-ecrire-action-editer-auteur
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-11T17:14:37.648308Z'
epss: 0.00364
epssPercentile: 0.30242
ingestedAt: '2026-09-13T23:55:07.224Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.