CVE-2026-62017 in Good Homes Plugin
Summary
by MITRE • 10/29/2026
Unauthenticated PHP Object Injection in Good Homes <= 1.3.13 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 Good Homes application, specifically affecting versions up to and including 1.3.13, represents a critical security deficiency rooted in improper handling of serialized data inputs. This type of vulnerability arises when an application accepts user-supplied input that is directly passed into PHP's unserialize function without adequate validation or sanitization. In the context of Good Homes, this likely occurs through parameters such as cookies, POST fields, or URL arguments where the application attempts to reconstruct a PHP object from the provided serialized string. Because the vulnerability allows for unauthenticated access, any external actor on the network can exploit this flaw without needing valid credentials, significantly lowering the barrier to entry for attackers and increasing the likelihood of successful exploitation in automated attack scenarios.
The technical mechanism behind PHP Object Injection relies on the existence of "gadgets" within the application's codebase or its dependencies. A gadget is a sequence of existing methods that can be chained together to produce an unintended side effect, such as arbitrary file read/write, remote code execution, or denial of service. When an attacker crafts a malicious serialized payload containing these gadgets and submits it to the vulnerable endpoint, the PHP engine deserializes the data into objects. As the application interacts with these newly instantiated objects, the chained methods execute automatically. This process bypasses standard authentication mechanisms because the injection occurs at the object instantiation level rather than through traditional login forms or API endpoints that enforce access controls. The attacker effectively hijacks the application's internal logic to perform actions intended for administrative functions or system-level operations.
From an operational perspective, the impact of this vulnerability is severe and potentially catastrophic depending on the server environment configuration. If successful exploitation leads to remote code execution, attackers can gain full control over the underlying web server hosting Good Homes. This allows them to exfiltrate sensitive customer data, including personal identifiable information and financial records stored in associated databases. Furthermore, compromised servers are often repurposed for malicious activities such as launching distributed denial-of-service attacks against third parties, mining cryptocurrency, or serving as pivot points for further network intrusion. The lack of authentication requirement means that the vulnerability is easily discoverable via automated scanners and can be exploited at scale, posing a significant risk to the reputation and compliance standing of organizations deploying this software version.
This flaw aligns with Common Weakness Enumeration identifier CWE-502, which describes Deserialization of Untrusted Data. It also maps closely to MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter sub-techniques if the injection leads to code execution, or T1190 for Exploit Public-Facing Application. The absence of input validation on serialized objects is a classic example of trusting user input implicitly, violating fundamental security principles regarding data integrity and source verification. Organizations running Good Homes versions 1.3.13 or earlier must treat this as a high-priority issue requiring immediate remediation to prevent potential compromise of their infrastructure and data assets.
Mitigation strategies should focus on both immediate patching and long-term secure coding practices. The most effective solution is to upgrade the Good Homes application to version 1.3.14 or later, where the vendor has presumably addressed this deserialization flaw by implementing strict input validation or removing reliance on unsafe unserialization methods for user-controlled data. For environments where upgrading is not immediately feasible, temporary mitigations include disabling PHP's unserialize function if it is not strictly required for core functionality, although this may break legitimate features. Implementing a Web Application Firewall with rules specifically designed to detect and block malicious serialized payloads can also provide a layer of defense in depth. Additionally, developers should adopt secure deserialization practices such as using JSON instead of native PHP serialization where possible, or implementing an allowlist approach for class names during the unserialization process to prevent arbitrary object instantiation. Regular security audits and static code analysis tools configured to detect CWE-502 patterns are essential for preventing similar vulnerabilities in future development cycles.