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.
Published: 2026-09-11
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 15 Sep 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 15 Sep 2026 02:45:00 +0000

Type Values Removed Values Added
Description 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. 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.
Title SPIP < 4.4.18 Missing Authorization via ecrire/action/ editer_auteur SPIP < 4.4.18 Missing Authorization via ecrire/action/

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Spip
Spip spip
Vendors & Products Spip
Spip spip

Fri, 11 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
Description 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.
Title SPIP < 4.4.18 Missing Authorization via ecrire/action/ editer_auteur
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-15T02:11:24.247Z

Reserved: 2026-08-10T13:02:52.001Z

Link: CVE-2026-72709

cve-icon Vulnrichment

Updated: 2026-09-11T17:17:54.113Z

cve-icon NVD

Status : Deferred

Published: 2026-09-11T17:18:58.760

Modified: 2026-09-15T03:17:05.813

Link: CVE-2026-72709

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-11T20:30:02Z

Weaknesses