CVE-2026-62011 in Bonbon Plugin
Summary
by MITRE • 10/29/2026
Unauthenticated PHP Object Injection in Bonbon <= 1.11 versions.
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified as an unauthenticated PHP object injection flaw within Bonbon versions prior to or equal to 1.11 represents a critical security deficiency that allows remote attackers to execute arbitrary code on the target server without requiring valid credentials. This type of attack exploits the inherent dangers associated with PHP's serialization and deserialization mechanisms, specifically when user-controllable input is passed directly into functions such as unserialize() without adequate validation or sanitization. In the context of the Bonbon framework, this flaw likely stems from a failure to properly validate data sources that are used during the instantiation of objects, enabling an attacker to craft malicious serialized strings that manipulate internal application states or trigger unintended method calls upon deserialization.
From a technical perspective, PHP object injection vulnerabilities arise when applications accept user input and pass it directly into unserialization functions. If the application has access to known class definitions and their properties, an attacker can construct a payload containing a specially crafted object graph. When this malicious serialized data is processed by the vulnerable function, the PHP engine attempts to instantiate the specified classes. This process often triggers magic methods such as __wakeup(), __destruct(), or __toString() if they are defined within those classes. These methods may contain logic that interacts with file systems, executes system commands via functions like exec() or shell_exec(), or performs database operations, thereby granting the attacker a foothold on the underlying operating system. The absence of authentication requirements significantly amplifies the severity of this vulnerability, as it removes any barrier to entry for potential adversaries, allowing exploitation from anywhere on the network with internet connectivity.
The operational impact of successfully exploiting this vulnerability is severe and multifaceted. An attacker who gains control over the application's execution flow can achieve full remote code execution (RCE), effectively compromising the integrity, confidentiality, and availability of the affected system. This compromise allows for the exfiltration of sensitive data stored within the database or file system, including user credentials, personal identifiable information, and proprietary business logic. Furthermore, the compromised server can be used as a pivot point to launch attacks against other systems within the internal network, leading to lateral movement and broader infrastructure damage. The persistence established through such an injection could also facilitate long-term unauthorized access, making detection and remediation increasingly difficult over time if not addressed promptly.
This vulnerability aligns with CWE-502, which describes Deserialization of Untrusted Data, a category of weaknesses where applications deserialize data without ensuring its integrity or authenticity. Additionally, in the context of the MITRE ATT&CK framework, this exploitation technique maps to T1059 Command and Scripting Interpreter, specifically through mechanisms that allow for remote code execution via application-level vulnerabilities. The lack of authentication places it firmly within the initial access phase of an attack lifecycle, where adversaries seek to establish a presence in the target environment before moving toward privilege escalation or data exfiltration stages.
Mitigation strategies must focus on eliminating the root cause by avoiding the use of untrusted input with deserialization functions entirely. If serialization is necessary for application functionality, developers should implement strict allowlists that restrict which classes can be instantiated during deserialization processes. Alternatively, using JSON-based formats instead of PHP's native serialized format can significantly reduce risk as they do not support object instantiation in the same manner. For organizations currently running Bonbon versions up to 1.11, immediate upgrading to a patched version is the most effective remediation step. In cases where an upgrade is not immediately feasible, implementing web application firewall rules that detect and block common serialization patterns or malicious payloads can provide a temporary layer of defense while permanent fixes are deployed. Regular security audits and static code analysis tools should also be employed to identify similar vulnerabilities across the entire codebase before they can be exploited in production environments.