Overview
This report covers the vulnerability CVE-2025-6742, a PHP Object Injection flaw in the SureForms – Drag and Drop Form Builder for WordPress plugin. All versions up to and including 1.7.3 are affected, and unauthenticated attackers can exploit this vulnerability. This issue is significant as it can potentially compromise the system or lead to data leakage if exploited in conjunction with other plugins or themes that have a POP chain.
Vulnerability Summary
CVE ID: CVE-2025-6742
Severity: High (7.5 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
SureForms – Drag and Drop Form Builder for WordPress| Up to and including 1.7.3
How the Exploit Works
The SureForms plugin has a flaw in the delete_entry_files() function. It uses file_exists() without placing any restriction on the path provided, making the plugin vulnerable to PHP Object Injection. This vulnerability can be exploited by unauthenticated users. However, the impact of this vulnerability relies on the presence of another plugin or theme containing a POP chain. If such a plugin or theme is installed, the attacker might be able to delete arbitrary files, retrieve sensitive data, or execute code based on the POP chain.
Conceptual Example Code
Here’s a conceptual example of a malicious request that could exploit this vulnerability:
POST /wp-admin/admin-ajax.php?action=sureforms_delete_entry_files HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"path": "../../../../../../../var/www/html/wp-config.php"
}In this scenario, the path is manipulated to point to a sensitive file (wp-config.php), which contains database connection details. If a POP chain is present, this file could be deleted or its contents leaked, potentially leading to a system compromise.
Mitigation
Users are urged to apply the vendor patch as soon as it becomes available. As a temporary measure, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could be used to help detect and prevent exploitation attempts.
