CVE-2025-6742 in SureForms Plugin
Summary
by MITRE • 07/09/2025
The SureForms – Drag and Drop Form Builder for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.7.3 via the use of file_exists() in the delete_entry_files() function without restriction on the path provided. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
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Analysis
by VulDB Data Team • 07/12/2025
The SureForms WordPress plugin presents a critical PHP Object Injection vulnerability that affects all versions up to and including 1.7.3. This vulnerability stems from improper input validation within the delete_entry_files() function where the file_exists() PHP function is employed without adequate path restriction controls. The flaw creates a dangerous condition where unauthenticated attackers can manipulate the file path parameter to inject malicious PHP objects into the application's execution flow. The vulnerability is classified under CWE-502 as it involves the deserialization of untrusted data, specifically PHP objects that can be manipulated during the object injection process. This type of vulnerability is particularly concerning in web applications because it can lead to arbitrary code execution when combined with existing POP (PHP Object Injection) chains present in the application environment.
The technical exploitation of this vulnerability occurs when an attacker can control the path parameter passed to the file_exists() function within the delete_entry_files() method. Without proper sanitization or validation of the file path, an attacker can inject serialized PHP objects that will be processed by the application's deserialization mechanism. The vulnerability is considered a low-severity issue in isolation due to the lack of a direct POP chain within the vulnerable plugin itself. However, this creates a dangerous dependency scenario where the presence of another plugin or theme with a functional POP chain transforms this vulnerability into a serious threat. The absence of a known POP chain in the vulnerable software means that attackers cannot directly execute code or perform arbitrary actions without leveraging additional components within the WordPress installation.
The operational impact of this vulnerability extends beyond simple object injection as it creates a potential attack vector that can be leveraged for more severe consequences when combined with other vulnerable components. Attackers can utilize this vulnerability to perform arbitrary file deletion operations, potentially compromising sensitive data stored in the application's file system. The attack surface becomes significantly larger when considering that WordPress installations often include multiple plugins and themes, each potentially containing vulnerable POP chains. The vulnerability's exploitation requires no authentication, making it particularly dangerous as it can be targeted by automated scanning tools and malicious actors without requiring any valid credentials. This characteristic aligns with ATT&CK technique T1213.002 which involves the exploitation of deserialization vulnerabilities to gain unauthorized access or execute arbitrary code.
Security practitioners must understand that while the vulnerability itself appears to be limited in scope due to the missing POP chain, the potential for escalation makes it a significant concern. The vulnerability demonstrates how seemingly isolated security flaws can become critical when combined with other components within a complex application environment. The lack of a direct POP chain in the vulnerable plugin means that exploitation requires additional conditions, but this does not diminish the importance of addressing the vulnerability. Organizations should implement comprehensive security measures including input validation, proper path restriction, and regular security audits of all installed plugins and themes. The vulnerability also highlights the importance of dependency management and the need for security professionals to consider the entire application ecosystem when assessing potential attack vectors rather than focusing on individual components in isolation.