Description
The file mexcel.php in the Vfront 0.99.52 codebase contains a vulnerable call to unserialize(base64_decode($_POST['mexcel'])), where $_POST['mexcel'] is user-controlled input. This input is decoded from base64 and deserialized without validation or use of the allowed_classes option, allowing an attacker to inject arbitrary PHP objects. This can lead to malicious behavior, such as Remote Code Execution (RCE), SQL Injection, Path Traversal, or Denial of Service, depending on the availability of exploitable classes in the Vfront codebase or its dependencies.
References1
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 37 · as of 9 November 2026
- CWE
- CWE-89
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.