What is CVE-2026-30940?

CVE-2026-30940 is a high-severity vulnerability in Baserproject Basercms, classified under Path Traversal. CVSS score: 7.2/10. Published 2026-03-31.

How severe is CVE-2026-30940?

High severity. CVSS v3 base score is 7.2 out of 10.

Path Traversal in Baserproject Basercms

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 authenti…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.001 (34.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Baserproject Basercms — versions < 5.2.3

Weakness classification (CWE)

References

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

Frequently asked questions

What is CVE-2026-30940?: CVE-2026-30940 is a high-severity vulnerability in Baserproject Basercms, classified under Path Traversal. CVSS score: 7.2/10. Published 2026-03-31.
How severe is CVE-2026-30940?: High severity. CVSS v3 base score is 7.2 out of 10.