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CVE-2023-48648

Concrete CMS allows unauthorized access because directories can be created with insecure permissions

9.8 CriticalFix available

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

1.23%Up 1.2 points since Nov 17, 2023
90%50%10%1%

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 CriticalCVSS: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 CriticalCVSS: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 CriticalCVSS: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 CriticalCVSS: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

Affected packages
PackageAffectedFixed
concrete5/concrete5
Packagist
before 8.5.13
8.5.13
concrete5/concrete5
Packagist
9.0.0 up to 9.2.2
9.2.2
concrete5/concrete5
Packagist
before 8.5.13, plus listed versions
8.08.0.18.0.28.0.38.1.0
Show 30 moreShow less
8.2.08.2.0RC28.2.18.3.08.3.18.3.28.4.08.4.0RC38.4.0RC48.4.18.4.28.4.38.4.48.4.58.5.08.5.0RC18.5.0RC28.5.18.5.108.5.118.5.128.5.28.5.38.5.48.5.58.5.68.5.6RC18.5.78.5.88.5.9
8.5.13
concrete5/concrete5
Packagist
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 less
9.1.39.2.09.2.0RC29.2.1
9.2.2

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE 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

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