OS Command Injection Vulnerability and Potential Zip Slip Vulnerability
Priority MEDIUM 43CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.
Summary
There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted zip files which may execute arbitrary commands on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.
Why it matters now
EPSS 0.02173 82nd percentileScored 2026-11-07
Fix Fixed basercms (baserproject): 4.5.4baserproject/basercms (Packagist): 4.5.4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| baserproject | basercms | before 4.5.4 | 4.5.4 | Patch available | CNA |
| — | baserproject/basercms (Packagist) | before 4.5.4 | 4.5.4 | Patch available | GHSA-7rpc-9m88-cf9w |
- basercms Vendorbaserproject Affected before 4.5.4 Fixed in 4.5.4 Patch available CNA
- baserproject/basercms (Packagist) Vendor— Affected before 4.5.4 Fixed in 4.5.4 Patch available GHSA-7rpc-9m88-cf9w
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* | before 4.5.4 | Vulnerable | baserproject |
- cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* Versions before 4.5.4 Vulnerable ·baserproject
Remediation
- Fix · CNA basercms (baserproject) Fixed in 4.5.4
- Fix · GHSA-7rpc-9m88-cf9w baserproject/basercms (Packagist) Fixed in 4.5.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-41243
- 2026-10-03 Alias added: GHSA-7rpc-9m88-cf9w
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-2026-23707 baserCMS: Mail Form Acceptance Bypass via Public API CVSS 3.1MEDIUM 5.3
- 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
Sources
- CVE-2021-41243 · CVE Program
- CVE-2021-41243 · NVD
- FIRST EPSS
- GHSA-7rpc-9m88-cf9w · 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