Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows unauthorized access because…
Priority MEDIUM 51CWE-276Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.
Summary
Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows unauthorized access because directories can be created with insecure permissions. File creation functions (such as the Mkdir() function) gives universal access (0777) to created folders by default. Excessive permissions can be granted when creating a directory with permissions greater than 0755 or when the permissions argument is not specified.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01233 69th percentileScored 2026-11-07
Fix Fixed concrete5/concrete5 (Packagist): 8.5.13, 9.2.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | concrete5/concrete5 (Packagist) | before 8.5.13 | 8.5.13 | Patch available | GHSA-m87h-jxr6-f82w |
| — | concrete5/concrete5 (Packagist) | 9.0.0 to before 9.2.2 | 9.2.2 | Patch available | GHSA-m87h-jxr6-f82w |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- concrete5/concrete5 (Packagist) Vendor— Affected before 8.5.13 Fixed in 8.5.13 Patch available GHSA-m87h-jxr6-f82w
- concrete5/concrete5 (Packagist) Vendor— Affected 9.0.0 to before 9.2.2 Fixed in 9.2.2 Patch available GHSA-m87h-jxr6-f82w
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* | before 8.5.13; 9.0 to before 9.2.2 | Vulnerable | Concrete CMS |
- cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* Versions before 8.5.13; 9.0 to before 9.2.2 Vulnerable ·Concrete CMS
Remediation
- Fix · GHSA-m87h-jxr6-f82w concrete5/concrete5 (Packagist) Fixed in 8.5.13 Advisory →
- Fix · GHSA-m87h-jxr6-f82w concrete5/concrete5 (Packagist) Fixed in 9.2.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-48648
- 2026-10-03 Alias added: GHSA-m87h-jxr6-f82w
References
Advisory 2
Other 6
- https://documentation.concretecms.org/developers/introduction/version-history/922-release-notes
- https://documentation.concretecms.org/developers/introduction/version-history/8513-release-notes
- https://github.com/concretecms/concretecms/pull/11677
- https://github.com/concretecms/concretecms/commit/707b974826b761dda5c0baaf345c8582157d9307
- https://github.com/concretecms/concretecms/commit/eb882681a0ed19798a8f689d257af8dfe2f3a279
- https://github.com/concretecms/concretecms
More Concrete Cms vulnerabilities
- TI-2026-23602 ConcreteCMS v9.4.7 contains a Denial of Service (DoS) vulnerability in the File Manager… CVSS 3.1MEDIUM 6.5
- TI-2023-23992 A Cross Site Scripting (XSS) vulnerability in Concrete CMS from versions 9.2.0 to 9.2.2… CVSS 3.1MEDIUM 5.4
- TI-2026-14907 Missing authorization in Concrete CMS CVSS 4.0HIGH 8.7
- TI-2022-06200 Cleartext transmission of sensitive information in https://github.com/concrete5/concrete5 CVSS 3.1CRITICAL 9.8
- TI-2021-17294 An issue was discovered in Concrete CMS through 8.5.5. CVSS 3.1CRITICAL 9.8
- TI-2021-05819 Server-side request forgery in https://github.com/concrete5/concrete5 CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-48648 · CVE Program
- CVE-2023-48648 · NVD
- FIRST EPSS
- GHSA-m87h-jxr6-f82w · 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