baserCMS has Unsafe File Upload Leading to Remote Code Execution (RCE)
Published Mar 31, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
baserCMS has Unsafe File Upload Leading to Remote Code Execution (RCE)
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
The application's restore function allows users to upload a `.zip` file, which is then automatically extracted. A PHP file inside the archive is included using `require_once` without validating or restricting the filename. An attacker can craft a malicious PHP file within the zip and achieve arbitrary code execution when it is included.
Potential impact
Remote Code Execution (RCE)
Technical context
The application's restore function allows users to upload a .zip file, which is then automatically extracted. A PHP file inside the archive is included using requireonce without validating or restricting the filename. An attacker can craft a malicious PHP file within the zip and achieve arbitrary code execution when it is included. Vector: Malicious ZIP upload + insecure requireonce
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Mar 31, 2026 · Last refreshed Nov 3, 2026