CVE-2026-40751 in Ashtanga Plugin
Summary
by MITRE • 06/17/2026
Unauthenticated PHP Object Injection in Ashtanga <= 1.2 versions.
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Analysis
by VulDB Data Team • 06/17/2026
The vulnerability identified as unauthenticated php object injection in Ashtanga versions 1.2 and earlier represents a critical security flaw that allows remote attackers to execute arbitrary code on affected systems. This vulnerability stems from insufficient input validation and improper handling of serialized data within the application's object serialization mechanisms. The flaw exists in the way the software processes user-supplied data that gets deserialized into php objects, creating an avenue for attackers to inject malicious objects that can be executed during the deserialization process. The impact is particularly severe because the vulnerability does not require authentication, meaning any remote user can exploit it without prior access credentials. This type of vulnerability falls under the category of CWE-502 which specifically addresses deserialization of untrusted data, and it aligns with ATT&CK technique T1203 which involves exploitation of software vulnerabilities for code execution. The affected versions of Ashtanga fail to implement proper sanitization and validation of input parameters that are processed through php's unserialize function, creating a direct path for attackers to manipulate the application's behavior through crafted payload data.
The technical exploitation of this vulnerability occurs when an attacker sends maliciously crafted data to the application that contains serialized php objects. During normal operation, php applications may serialize objects for storage or transmission, but when these serialized strings are processed without proper validation, they can be manipulated to include malicious code. In the context of Ashtanga, this typically involves sending specially crafted parameters that contain serialized php objects designed to execute commands on the server. The vulnerability's severity is amplified by the fact that the application processes these objects without adequate security controls, allowing the malicious code to execute with the privileges of the web server process. Attackers can leverage this to perform various malicious activities including but not limited to remote code execution, data exfiltration, privilege escalation, and complete system compromise. The lack of authentication requirements means that this vulnerability can be exploited by anyone with access to the network, making it particularly dangerous in environments where the application is exposed to the internet.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential data breaches. An attacker who successfully exploits this vulnerability can gain full control over the affected server, potentially using it as a pivot point to attack other systems within the network. The consequences include unauthorized access to sensitive data, modification of application functionality, and potential denial of service conditions. Organizations running affected versions of Ashtanga face significant risk of unauthorized system access, data loss, and potential regulatory compliance violations. The vulnerability also creates opportunities for attackers to establish persistent backdoors, install malware, or use the compromised system for further attacks against other targets. Given that this is a remote code execution vulnerability, the attack surface is extensive and can be exploited from anywhere on the internet without requiring physical access or prior authentication. The impact is particularly severe for organizations that rely on Ashtanga for critical business operations, as the vulnerability could lead to complete operational disruption and financial losses.
Mitigation strategies for this vulnerability must focus on immediate remediation and long-term security improvements. The most effective immediate solution is to upgrade to a patched version of Ashtanga that addresses the deserialization vulnerability. Organizations should also implement input validation controls that prevent malicious serialized data from being processed, including the use of allowlists for accepted data formats and proper sanitization of all user inputs. Network-level protections such as web application firewalls and intrusion detection systems can provide additional layers of defense by monitoring for suspicious patterns associated with exploitation attempts. Security hardening measures should include disabling unnecessary php functions that could be exploited, implementing proper access controls, and ensuring that the application runs with minimal required privileges. Regular security audits and vulnerability assessments should be conducted to identify similar issues in other components of the application stack. Organizations should also establish incident response procedures to quickly detect and respond to exploitation attempts, including monitoring for unusual system activity and maintaining up-to-date backups to facilitate recovery in case of successful attacks. The vulnerability serves as a reminder of the critical importance of secure coding practices and proper input validation in preventing object injection attacks.