CVE-2026-104070

The Crayons plugin for SPIP before 3.5.0 contains a missing authorization vulnerability that allows unauthenticated attackers to modify arbitrary editable object fields by omitting the secu_ anti-forgery parameter in crayons_store.php, causing the authorization dispatcher to resolve an unconditionally-true handler instead of the proper modification check. Attackers can chain this flaw to write a malicious .html skeleton file, disclose sensitive configuration files containing the site secret, and forge a signed ajax context to execute the uploaded skeleton, achieving arbitrary PHP code execution as the web-server user.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://blog.spip.net/Mises-a-jour-de-securite-critique-plugins-Crayons-et-Simplog.html?lang=fr
https://plugins.spip.net/crayons.html?lang=fr
https://www.vulncheck.com/advisories/spip-crayons-plugin-authorization-bypass-rce

Configurations

No configuration.

History

06 Oct 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 17:17

Updated : 2026-10-09 02:16

NVD link : CVE-2026-104070

Mitre link : CVE-2026-104070

CVE.ORG link : CVE-2026-104070

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

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