CVE-2026-62016 in Gamic Plugin
Summary
by MITRE • 10/29/2026
Unauthenticated PHP Object Injection in Gamic <= 1.19 versions.
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified as an unauthenticated PHP object injection flaw within the Gamic content management system, specifically affecting versions up to and including 1.19, represents a critical security deficiency that allows remote attackers to execute arbitrary code on the target server without requiring valid credentials. This type of vulnerability stems from the improper handling of user-supplied input during the deserialization process in PHP applications. When an application accepts data from external sources such as HTTP requests and passes it directly into functions like unserialize() or similar mechanisms, it creates a pathway for attackers to inject malicious serialized objects. In the context of Gamic 1.19, this flaw likely exists within a module or core component that processes input without adequate validation or sanitization before attempting to reconstruct PHP object instances from the provided data stream.
The technical mechanism behind this exploitation relies on the inherent behavior of PHP's serialization and deserialization functions. When an attacker crafts a specially formatted serialized string containing a maliciously constructed object, they can manipulate properties within that object to trigger dangerous methods during instantiation or destruction phases. If the application has access to classes with magic methods such as __wakeup(), __destruct(), or __toString() in its autoloaded files, these methods may execute system commands, read sensitive configuration files, or interact with databases based on the attacker-controlled property values. Because this vulnerability is unauthenticated, it does not require any prior login session or privilege escalation to exploit, making it particularly severe and easy to weaponize using automated scanning tools found in common penetration testing frameworks.
From an operational perspective, successful exploitation of this PHP object injection flaw can lead to a complete compromise of the underlying web server infrastructure. Attackers typically leverage this access point to achieve remote code execution (RCE), which serves as a foothold for further lateral movement within the network environment. The immediate impact includes unauthorized modification or deletion of website content, theft of sensitive user data stored in associated databases, and potential installation of backdoors or malware such as web shells that persist even after initial detection attempts. Furthermore, because Gamic is often deployed on shared hosting environments or smaller business websites with potentially weaker security postures, the blast radius can extend to other applications hosted on the same server if proper isolation measures are not in place.
This vulnerability aligns closely with Common Weakness Enumeration (CWE) category CWE-502, which describes Deserialization of Untrusted Data. It also maps directly to MITRE ATT&CK technique T1059, specifically sub-technique 001 for Command and Scripting Interpreter: PHP, as the ultimate goal is often to execute system commands through injected object methods. The lack of authentication required for exploitation places this flaw in a high-severity category according to standard vulnerability scoring systems like CVSS, primarily due to its low attack complexity and wide availability of exploit code online.
To mitigate this risk, organizations running Gamic versions 1.19 or earlier must immediately upgrade to the latest patched version where developers have implemented strict input validation and restricted deserialization sources. If upgrading is not immediately feasible, administrators should implement a Web Application Firewall (WAF) rule set designed to detect and block malicious serialized payloads containing known dangerous class names or magic method signatures. Additionally, disabling unnecessary PHP extensions and restricting access to sensitive directories can reduce the attack surface available to an attacker attempting to leverage this deserialization flaw for further exploitation efforts.