CVE-2026-30940

HIGH EPSS 59.9%
Published Mar 31, 20263mo ago · Modified Jun 17, 20261w ago
7.2 CVSS 3.1
High
Find Similar
Published Mar 31, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.2
Exploitability
1.2
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
59.9% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-22 Path Traversal Resource Mgmt
CWE-73

Affected Products 1

VendorProductVersionRange
basercmsbasercms* <5.2.3

References 3

  • basercms.net https://basercms.net/security/JVN_20837860
    Vendor Advisory
  • github.com https://github.com/baserproject/basercms/releases/tag/5.2.3
    Release Notes
  • github.com https://github.com/baserproject/basercms/security/advisories/GHSA-c5c6-37vq-pjcq
    ExploitVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.