CVE-2026-65571 in 69 Clothing Plugin
Summary
by MITRE • 08/06/2026
Unauthenticated PHP Object Injection in 69 Clothing <= 1.2.11.1 versions.
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Analysis
by VulDB Data Team • 08/06/2026
This vulnerability represents a critical security flaw in the 69 Clothing WordPress plugin version 1.2.11.1 and earlier, where unauthenticated PHP object injection occurs due to improper input validation and sanitization of user-supplied data. The vulnerability stems from the plugin's failure to properly validate or escape parameters that are directly passed to unserialize() functions, creating an avenue for arbitrary code execution without requiring authentication. This type of vulnerability maps directly to CWE-502 which specifically addresses deserialization of untrusted data, and falls under the ATT&CK technique T1203 for Exploitation for Client Execution.
The technical implementation involves the plugin accepting serialized PHP objects through GET or POST parameters that are then processed through unserialize() without adequate security controls. An attacker can craft malicious serialized objects containing PHP code that will be executed when the plugin processes these inputs. The vulnerability exists because the plugin's code does not implement proper input sanitization, validation, or use of secure deserialization practices. This flaw allows for complete system compromise including arbitrary file read/write operations, remote code execution, and potential privilege escalation within the WordPress environment.
The operational impact of this vulnerability is severe as it enables attackers to execute arbitrary PHP code on vulnerable systems without any authentication requirements, making it particularly dangerous in public-facing web applications. An attacker can leverage this vulnerability to upload malicious files, establish backdoors, steal sensitive data, modify website content, or use the compromised system as a pivot point for attacking other network resources. The unauthenticated nature of the exploit means that even without valid credentials, an attacker can immediately begin exploiting the system and potentially gain full administrative control over the WordPress installation.
Mitigation strategies should include immediate patching of the 69 Clothing plugin to version 1.2.11.2 or later where this vulnerability has been addressed. Organizations should implement proper input validation and sanitization measures, avoid using unserialize() with user-supplied data, and employ secure coding practices that prevent deserialization of untrusted inputs. Additionally, web application firewalls should be configured to detect and block suspicious serialized object patterns, network segmentation can limit the impact of successful exploitation, and regular security audits should verify that no other similar vulnerabilities exist within the WordPress ecosystem. The vulnerability highlights the importance of following secure coding guidelines as outlined in OWASP Top 10 and emphasizes the need for robust input validation mechanisms to prevent deserialization attacks.