GHSA-8cr7-r8qw-gp3c · Severity: medium · Ecosystem: composer — baserCMS has Mail Form Acceptance Bypass via Public API
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.
Conclusion & alert: CVE-2026-30878 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-22 | 0.06% | 0.02% | -0.04% |
| 2 | 2026-05-12 | 0.05% | 0.06% | +0.01% |
| 3 | 2026-03-31 | — | 0.05% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
GHSA-8cr7-r8qw-gp3c · Severity: medium · Ecosystem: composer — baserCMS has Mail Form Acceptance Bypass via Public API
| URL | Tags |
|---|---|
| https://basercms.net/security/JVN_20837860 | Vendor Advisory |
| https://github.com/baserproject/basercms/releases/tag/5.2.3 | Release Notes |
| https://github.com/baserproject/basercms/security/advisories/GHSA-8cr7-r8qw-gp3c | Exploit Vendor Advisory |