Missing authentication in Craft CMS cms
Priority HIGH 70CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.
Summary
Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, guest users can access Config Sync updater index, obtain signed data, and execute state-changing Config Sync actions (regenerate-yaml, apply-yaml-changes) without authentication. This issue has been patched in versions 4.17.8 and 5.9.14.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00376 31st percentileScored 2026-11-07
Fix Fixed cms (craftcms): 4.17.8, 5.9.14craftcms/cms (Packagist): 5.9.14, 4.17.8
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
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 | 4.0.0-RC1 to before 4.17.8; 5.0.0-RC1 to before 5.9.14 | 4.17.8, 5.9.14 | Patch available | CNA |
| — | craftcms/cms (Packagist) | 5.0.0-RC1 to before 5.9.14 | 5.9.14 | Patch available | GHSA-6mrr-q3pj-h53w |
| — | craftcms/cms (Packagist) | 4.0.0-RC1 to before 4.17.8 | 4.17.8 | Patch available | GHSA-6mrr-q3pj-h53w |
- cms VendorCraft CMS Affected 4.0.0-RC1 to before 4.17.8; 5.0.0-RC1 to before 5.9.14 Fixed in 4.17.8, 5.9.14 Patch available CNA
- craftcms/cms (Packagist) Vendor— Affected 5.0.0-RC1 to before 5.9.14 Fixed in 5.9.14 Patch available GHSA-6mrr-q3pj-h53w
- craftcms/cms (Packagist) Vendor— Affected 4.0.0-RC1 to before 4.17.8 Fixed in 4.17.8 Patch available GHSA-6mrr-q3pj-h53w
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* | after 4.0.0, before 4.17.8; after 5.0.0, before 5.9.14 | Vulnerable | Craft CMS |
| cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:* | 4.0.0 | Vulnerable | Craft CMS |
| cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:* | 4.0.0 rc1 | Vulnerable | Craft CMS |
| cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:* | 4.0.0 rc2 | Vulnerable | Craft CMS |
| cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:* | 4.0.0 rc3 | Vulnerable | Craft CMS |
| cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:* | 5.0.0 | Vulnerable | Craft CMS |
| cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:* | 5.0.0 rc1 | Vulnerable | Craft CMS |
- cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* Versions after 4.0.0, before 4.17.8; after 5.0.0, before 5.9.14 Vulnerable ·Craft CMS
- cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·Craft CMS
- cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:* Versions 4.0.0 rc1 Vulnerable ·Craft CMS
- cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:* Versions 4.0.0 rc2 Vulnerable ·Craft CMS
- cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:* Versions 4.0.0 rc3 Vulnerable ·Craft CMS
- cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:* Versions 5.0.0 Vulnerable ·Craft CMS
- cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:* Versions 5.0.0 rc1 Vulnerable ·Craft CMS
Remediation
- Fix · CNA cms (craftcms) Fixed in 4.17.8, 5.9.14
- Fix · GHSA-6mrr-q3pj-h53w craftcms/cms (Packagist) Fixed in 5.9.14 Advisory →
- Fix · GHSA-6mrr-q3pj-h53w craftcms/cms (Packagist) Fixed in 4.17.8 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33159
- 2026-10-03 Alias added: GHSA-6mrr-q3pj-h53w
References
Advisory 2
More Craft Cms vulnerabilities
- 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
Sources
- CVE-2026-33159 · CVE Program
- CVE-2026-33159 · NVD
- FIRST EPSS
- GHSA-6mrr-q3pj-h53w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences