CVE-2023-48648
Concrete CMS allows unauthorized access because directories can be created with insecure permissions
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
9.8
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.
- Record
CVE-2023-48648- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-276
- Updated
- 2026-11-02
CVE List
9.8
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.
- Record
CVE-2023-48648- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-276
- Updated
- 2026-11-02
EUVDEUVD-2023-2998
9.8
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.
- Record
EUVD-2023-2998- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m87h-jxr6-f82w No score
Concrete CMS allows unauthorized access because directories can be created with insecure permissions
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.
- Record
GHSA-m87h-jxr6-f82w- Updated
- 2026-11-02
OSV
9.8
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.
- Record
CVE-2023-48648- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-m87h-jxr6-f82w No score
Concrete CMS allows unauthorized access because directories can be created with insecure permissions
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.
- Record
GHSA-m87h-jxr6-f82w- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
concrete5/concrete5Packagist |
before 8.5.13 | 8.5.13 |
concrete5/concrete5Packagist |
9.0.0 up to 9.2.2 | 9.2.2 |
concrete5/concrete5Packagist |
before 8.5.13, plus listed versions 8.08.0.18.0.28.0.38.1.0 Show 30 moreShow less8.2.08.2.0RC28.2.18.3.08.3.18.3.28.4.08.4.0RC38.4.0RC48.4.18.4.28.4.38.4.48.4.58.5.08.5.0RC18.5.0RC28.5.18.5.108.5.118.5.128.5.28.5.38.5.48.5.58.5.68.5.6RC18.5.78.5.88.5.9 |
8.5.13 |
concrete5/concrete5Packagist |
9.0.0 up to 9.2.2, plus listed versions 9.0.19.0.29.1.09.1.19.1.2 Show 4 moreShow less9.1.39.2.09.2.0RC29.2.1 |
9.2.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-48648 is a critical vulnerability (CVSS 9.8) in Concretecms Concrete Cms, published November 17, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.23%, the 69th percentile. Fixed in concrete5/concrete5 8.5.13.
References
concretecms.org/about/project-news/security/2023-11-09-security-blog-about-updated-cves-and-new-release
documentation.concretecms.org/developers/introduction/version-history/922-release-notes
documentation.concretecms.org/developers/introduction/version-history/8513-release-notes
nvd.nist.gov/vuln/detail/CVE-2023-48648
github.com/concretecms/concretecms/pull/11677
github.com/concretecms/concretecms/commit/707b974826b761dda5c0baaf345c8582157d9307