baserCMS: Mail Form Acceptance Bypass via Public API
Priority MEDIUM 63CWE-285Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-285.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00397 34th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed basercms (baserproject): 5.2.3baserproject/basercms (Packagist): 5.2.3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| baserproject | basercms | before 5.2.3 | 5.2.3 | Patch available | CNA |
| — | baserproject/basercms (Packagist) | before 5.2.3 | 5.2.3 | Patch available | GHSA-8cr7-r8qw-gp3c |
- basercms Vendorbaserproject Affected before 5.2.3 Fixed in 5.2.3 Patch available CNA
- baserproject/basercms (Packagist) Vendor— Affected before 5.2.3 Fixed in 5.2.3 Patch available GHSA-8cr7-r8qw-gp3c
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* | before 5.2.3 | Vulnerable | baserproject |
- cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* Versions before 5.2.3 Vulnerable ·baserproject
Remediation
- Fix · CNA basercms (baserproject) Fixed in 5.2.3
- Fix · GHSA-8cr7-r8qw-gp3c baserproject/basercms (Packagist) Fixed in 5.2.3 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-30878
- 2026-10-03 Alias added: GHSA-8cr7-r8qw-gp3c
References
More baserproject Basercms vulnerabilities
- TI-2026-17563 baserCMS: OS Command Injection Leading to Remote Code Execution (RCE) CVSS 3.1CRITICAL 9.1
- TI-2025-23967 baserCMS: unsafe File Upload Leading to Remote Code Execution (RCE) CVSS 3.1HIGH 8.7
- TI-2023-10935 baserCMS File Uploader Remote Code Execution (RCE) vulnerability CVSS 3.1CRITICAL 9.8
- TI-2023-10936 baserCMS allows any file to be uploaded CVSS 3.1CRITICAL 9.8
- TI-2023-23483 baserCMS Code Injection Vulnerability in Mail Form Feature CVSS 3.1CRITICAL 9.8
- TI-2026-23709 baserCMS: OS command injection vulnerability in installer CVSS 4.0CRITICAL 9.2
Sources
- CVE-2026-30878 · CVE Program
- CVE-2026-30878 · NVD
- FIRST EPSS
- GHSA-8cr7-r8qw-gp3c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences