7.2High
CVE-2026-30940baserCMS: Path Traversal in Theme File API Leads to Arbitrary File Write and RCE
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| basercms | basercms | < 5.2.3 | |
| baserproject | basercms | < 5.2.3 |
References and patches
- https://github.com/baserproject/basercms/security/advisories/GHSA-c5c6-37vq-pjcq ExploitVendor Advisory
- https://basercms.net/security/JVN_20837860 Vendor Advisory
- https://github.com/baserproject/basercms/releases/tag/5.2.3 Release Notes
CPE matches (NVD) (1)
cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*< 5.2.3