CVE-2026-30878

baserCMS: Mail Form Acceptance Bypass via Public API

MEDIUM
5.3
CVSS Score
Published: March 31, 2026 at 12:45 AM UTC
Updated: June 17, 2026 at 10:33 AM UTC
2 products affected across 2 vendorsBasercmsBasercms

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.2.3
Affected range stops below 5.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/baserproject/basercms/security/advisories/GHSA-8cr7-r8qw-gp3c
x_refsource_MISCVendor Advisory
Source: cverecord
https://basercms.net/security/JVN_20837860
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/baserproject/basercms/releases/tag/5.2.3

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-285

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