CVE-2026-65576 in Adrena Plugin
Summary
by MITRE • 08/06/2026
Unauthenticated PHP Object Injection in Adrena <= 1.2.14 versions.
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Analysis
by VulDB Data Team • 08/06/2026
This vulnerability represents a critical security flaw in the Adrena plugin version 1.2.14 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 adequately validate or sanitize parameters passed through HTTP requests, particularly those related to serialized PHP objects that are directly processed without sufficient security controls. Attackers can exploit this weakness by crafting malicious payloads containing serialized PHP objects that, when deserialized, execute arbitrary code on the target server.
The technical implementation of this vulnerability allows attackers to bypass authentication mechanisms entirely since no user credentials or session validation is required for exploitation. This type of attack falls under the category of CWE-502 which specifically addresses Deserialization of Untrusted Data, a well-known weakness in web applications where object deserialization processes are not properly secured against malicious input. The vulnerability enables attackers to manipulate the plugin's internal object handling mechanisms, potentially leading to complete system compromise through remote code execution.
From an operational impact perspective, this vulnerability presents a severe risk to WordPress installations using the affected Adrena plugin, as it allows attackers to execute arbitrary PHP code without authentication. The exploitation process typically involves crafting specially formatted requests that contain serialized objects designed to trigger specific methods within the plugin's codebase when deserialized. This could enable attackers to upload malicious files, modify existing content, steal sensitive data, or establish persistent backdoors on compromised systems.
The attack surface for this vulnerability is particularly concerning as it affects any WordPress installation running an affected version of the Adrena plugin, with no authentication required for exploitation. This aligns with ATT&CK technique T1059.007 which covers "Command and Scripting Interpreter: PowerShell" but more broadly encompasses any remote code execution via deserialization attacks. Organizations should immediately update to the latest version of the Adrena plugin where this vulnerability has been patched, implement proper input validation measures, and monitor for suspicious activities that might indicate exploitation attempts.
Mitigation strategies include applying the vendor's security patch as soon as it becomes available, implementing network-based intrusion detection systems to monitor for known malicious payloads, and conducting thorough security audits of all WordPress plugins to identify similar vulnerabilities. Additional defensive measures should encompass proper input validation at multiple layers, disabling unnecessary PHP functions that could aid exploitation, and maintaining comprehensive logging and monitoring capabilities to detect anomalous behavior patterns associated with deserialization attacks. The vulnerability demonstrates the critical importance of proper object serialization and deserialization practices in web applications, as highlighted by industry best practices in secure coding guidelines and security frameworks such as OWASP Top Ten.