CVE-2026-30940
HIGHbaserCMS: Path Traversal in Theme File API Leads to Arbitrary File Write and RCE
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/baserproject/basercms/security/advisories/GHSA-c5c6-37vq-pjcq
X_Refsource_Misc x_refsource_misc
https://basercms.net/security/JVN_20837860
X_Refsource_Misc x_refsource_misc
https://github.com/baserproject/basercms/releases/tag/5.2.3
Scores
CVSS v3
7.2
EPSS
0.0105
EPSS Percentile
59.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-22
CWE-73
Status
published
Products (3)
basercms/basercms
< 5.2.3
baserproject/basercms
0 - 5.2.3Packagist
baserproject/basercms
< 5.2.3
Published
Mar 31, 2026
Tracked Since
Mar 31, 2026