What is CVE-2026-30878?

CVE-2026-30878 is a medium-severity vulnerability in Baserproject Basercms, classified under Improper Authorization. CVSS score: 5.3/10. Published 2026-03-31.

How severe is CVE-2026-30878?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Baserproject Basercms

CVE-2026-30878

baserCMS is a website development framework. Prior to version 5.2.3, a public mail submission API allows unauthenticated users to submit mail form entries even when the corresponding form is not accepting submissions. This bypasses adminis…

EPSS: 0.000 (5.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Baserproject Basercms — versions < 5.2.3

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

https://github.com/baserproject/basercms/security/advisories/GHSA-8cr7-r8qw-gp3c (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-2026-30878?: CVE-2026-30878 is a medium-severity vulnerability in Baserproject Basercms, classified under Improper Authorization. CVSS score: 5.3/10. Published 2026-03-31.
How severe is CVE-2026-30878?: Medium severity. CVSS v3 base score is 5.3 out of 10.