CVE-2026-30940

7.2 highEPSS 1.1%

High (7.2) in basercms basercms. EPSS 1.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.2 high

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

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-31)
CWEs: CWE-22, CWE-73
Published: 2026-03-31
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

basercms:basercms

References

https://basercms.net/security/JVN_20837860
https://github.com/baserproject/basercms/releases/tag/5.2.3
https://github.com/baserproject/basercms/security/advisories/GHSA-c5c6-37vq-pjcq

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