CVE-2026-30878

MEDIUM 5.3

baserCMS: Mail Form Acceptance Bypass via Public API

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

15th

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 administrative controls intended to stop form intake and enables spam or abuse via the API. This issue has been patched in version 5.2.3.

CWE	CWE-285
Vendor	baserproject
Product	basercms
Published	Mar 31, 2026
Last Updated	Mar 31, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

baserproject / basercms

< 5.2.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/baserproject/basercms/security/advisories/GHSA-8cr7-r8qw-gp3c basercms.net: https://basercms.net/security/JVN_20837860 github.com: https://github.com/baserproject/basercms/releases/tag/5.2.3