CVE-2026-72709
Deferred Deferred - Pending Action

SPIP Missing Authorization in Admin Action Endpoints

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: VulnCheck

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.

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-11
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-72709
EUVD
EUVD-2026-76155

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
spip spip to 4.4.18 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

SPIP before version 4.4.18 has a missing authorization vulnerability in administrative action endpoints under ecrire/action/. Unauthenticated attackers can exploit a valid HMAC-SHA256 nonce to perform privileged actions without server-side permission checks. The vulnerability affects the autoriser() function, allowing attackers to reset passwords of any user account, including administrators, by invoking the editer_auteur action directly over HTTP.

Impact Analysis

This vulnerability allows unauthenticated attackers to reset passwords of any user account, including administrators, leading to full system compromise. Attackers can gain complete control over the SPIP instance, access sensitive data, and perform unauthorized actions.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA compliance requirements. It may result in data breaches, unauthorized disclosure of personal or health information, and failure to maintain data integrity and confidentiality.

Mitigation Strategies

Immediately upgrade SPIP to version 4.4.18 or later to address the missing authorization vulnerability in the administrative action endpoints.

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