baserCMS is a website development framework. Prior to version 5.2.3, a path traversal vulnerability exists in the theme file management API (/baser/api/admin/bc-theme-file/theme_files/add.json) that allows arbitrary file write. An authenticated administrator can include ../ sequences in the path parameter to create a PHP file in an arbitrary directory outside the theme directory, which may result in remote code execution (RCE). This issue has been patched in version 5.2.3.
History

Fri, 03 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Baserproject
Baserproject basercms
Vendors & Products Baserproject
Baserproject basercms

Thu, 02 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Basercms
Basercms basercms
CPEs cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*
Vendors & Products Basercms
Basercms basercms

Tue, 31 Mar 2026 03:00:00 +0000

Type Values Removed Values Added
Description baserCMS is a website development framework. Prior to version 5.2.3, a path traversal vulnerability exists in the theme file management API (/baser/api/admin/bc-theme-file/theme_files/add.json) that allows arbitrary file write. An authenticated administrator can include ../ sequences in the path parameter to create a PHP file in an arbitrary directory outside the theme directory, which may result in remote code execution (RCE). This issue has been patched in version 5.2.3.
Title baserCMS: Path Traversal in Theme File API Leads to Arbitrary File Write and RCE
Weaknesses CWE-22
CWE-73
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-02T14:46:54.107Z

Reserved: 2026-03-07T17:34:39.978Z

Link: CVE-2026-30940

cve-icon Vulnrichment

Updated: 2026-04-02T14:46:39.387Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-31T01:16:36.430

Modified: 2026-04-01T20:26:17.970

Link: CVE-2026-30940

cve-icon Redhat

No data.