VULNERABILITY INTELLIGENCE

CVE-2026-30940

CVSS score7.2 HIGH

EPSS probability1.07%

CISA KEVNot currently listed

Published2026-03-31

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

security-advisories@github.com: CWE-22
nvd@nist.gov: CWE-22

Primary references

security-advisories@github.com — Vendor Advisory
security-advisories@github.com — Release Notes
security-advisories@github.com — Exploit, Vendor Advisory