TI-2026-25587 Aliases CVE-2026-33157 GHSA-2fph-6v5w-89hh

Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior

MEDIUM 41CWE-470Published 2026-03-24 · Updated 2026-03-25

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Craft CMS is a content management system (CMS). From version 5.6.0 to before version 5.9.13, a Remote Code Execution (RCE) vulnerability exists in Craft CMS, it can be exploited by any authenticated user with control panel access. This is a bypass of a previous fix. The existing patches add cleanseConfig() to assembleLayoutFromPost() and various FieldsController actions to strip Yii2 behavior/event injection keys ("as" and "on" prefixed keys). However, the fieldLayouts parameter in ElementIndexesController::actionFilterHud() is passed directly to FieldLayout::createFromConfig() without any sanitization, enabling the same behavior injection attack chain. This issue has been patched in version 5.9.13.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01114 66th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed cms (craftcms): 5.9.13craftcms/cms (Packagist): 5.9.13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Craft CMS	cms	5.6.0 to before 5.9.13	5.9.13	Patch available	CNA
—	craftcms/cms (Packagist)	5.6.0 to before 5.9.13	5.9.13	Patch available	GHSA-2fph-6v5w-89hh

cms VendorCraft CMS Affected 5.6.0 to before 5.9.13 Fixed in 5.9.13 Patch available CNA
craftcms/cms (Packagist) Vendor— Affected 5.6.0 to before 5.9.13 Fixed in 5.9.13 Patch available GHSA-2fph-6v5w-89hh

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:craftcms:craft_cms::::::::	5.6.0 to before 5.9.13	Vulnerable	Craft CMS

cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* Versions 5.6.0 to before 5.9.13 Vulnerable ·Craft CMS

Remediation

Fix · CNA cms (craftcms) Fixed in 5.9.13
Fix · GHSA-2fph-6v5w-89hh craftcms/cms (Packagist) Fixed in 5.9.13 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-33157
2026-10-03 Alias added: GHSA-2fph-6v5w-89hh

References

Exploit 1

https://github.com/craftcms/cms/security/advisories/GHSA-2fph-6v5w-89hh

Patch 1

https://github.com/craftcms/cms/commit/97e90b4bdee369c1af3ca77a77531132df240e4e

Advisory 3

Other 2

TI-2025-23503 Craft CMS Allows Remote Code Execution KEVCVSS 3.1CRITICAL 10.0
TI-2024-37138 RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms KEVCVSS 4.0CRITICAL 9.3
TI-2025-16994 Potential RCE with a compromised security key in craft/cms KEVCVSS 3.1HIGH 8.1
TI-2025-24595 Craft CMS stores user-provided content in session files KEVCVSS 4.0MEDIUM 6.9
TI-2023-22284 Craft CMS Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
TI-2024-25171 Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. CVSS 3.1CRITICAL 9.8

See all 96 →

Sources

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