CVE-2026-30940

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.

• CWE-22
• CWE-73
• CWE-22

• https://basercms.net/security/JVN_20837860Vendor Advisory
• https://github.com/baserproject/basercms/releases/tag/5.2.3Release Notes
• https://github.com/baserproject/basercms/security/advisories/GHSA-c5c6-37vq-pjcqExploit, Vendor Advisory

Published

Mar 31, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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