CVE-2026-62021 in Angio Plugin
Summary
by MITRE • 10/10/2026
Subscriber PHP Object Injection in Angio <= 1.1.1 versions.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/10/2026
The vulnerability identified as Subscriber PHP Object Injection in Angio versions prior to or equal to 1.1.1 represents a critical server-side security flaw rooted in the improper handling of user-supplied input during object deserialization processes. This type of vulnerability arises when an application accepts untrusted data and passes it directly into a function that reconstructs objects from serialized strings, such as PHP's unserialize() function, without performing adequate validation or sanitization checks on the content structure. In the context of the Angio platform, this flaw likely exists within modules responsible for managing subscriber information, where user inputs are processed to update or retrieve data structures stored in a serialized format. When an attacker crafts a maliciously formatted serialized payload containing arbitrary PHP objects with pre-configured properties and methods, they can exploit the application's trust in these deserialized entities to execute unintended code paths. This mechanism bypasses standard authentication controls if the vulnerable function is accessible without proper privilege verification or if the injection point allows for remote interaction via web requests.
From a technical perspective, this vulnerability aligns with CWE-502, which describes Deserialization of Untrusted Data. The core issue lies in the assumption that serialized data originates from a trusted source and has not been tampered with during transit or storage. In PHP applications, object injection is particularly dangerous because it allows attackers to instantiate classes that are available within the application's environment or included libraries. By manipulating properties such as __destruct(), __wakeup(), or other magic methods present in these instantiated objects, an attacker can trigger side effects like file system operations, database queries, or remote code execution depending on which classes are loaded and what capabilities they possess. The severity of this flaw is amplified by the fact that it does not require complex buffer overflow techniques; instead, it relies on logical flaws in how data integrity is maintained during state transitions within the application logic.
The operational impact of exploiting a PHP Object Injection vulnerability can range from complete system compromise to partial information disclosure and service disruption. If an attacker successfully injects objects leading to Remote Code Execution (RCE), they gain full control over the underlying server, allowing them to install backdoors, exfiltrate sensitive subscriber data, or pivot into other network segments. Even without RCE, attackers can leverage dangerous classes for Denial of Service attacks by causing infinite loops or excessive resource consumption through crafted object states. Furthermore, since this vulnerability affects subscriber management features, it directly threatens the confidentiality and integrity of user personal information stored within the Angio database. This includes email addresses, contact details, and potentially hashed passwords if those objects are manipulated to trigger password reset mechanisms or direct database queries via vulnerable ORM layers often associated with such frameworks.
Mitigation strategies for this vulnerability must focus on eliminating the root cause by avoiding untrusted deserialization entirely where possible. The most effective remediation is to refactor the codebase to use safe data interchange formats like JSON, which do not support arbitrary object instantiation and thus neutralize injection attacks based on class manipulation. If serialized data storage remains necessary due to legacy constraints, developers must implement strict allow-listing of permitted classes during deserialization rather than relying on deny lists or generic validation functions. Additionally, applying input validation at the entry points where subscriber data is received ensures that only expected data types and structures are processed before any internal serialization occurs. Upgrading Angio to version 1.1.2 or later resolves this issue by patching the specific code paths involved in subscriber handling. Organizations should also enforce Web Application Firewall rules that detect anomalous serialized payloads containing PHP object signatures, providing a layer of defense-in-depth while patches are deployed across production environments.
This vulnerability is categorized under MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter: PHP, as it enables the execution of arbitrary commands through script interpretation facilitated by object injection. It also relates to CWE-20 Improper Input Validation, highlighting the failure to verify that input conforms to expected specifications before processing. Security teams should prioritize patching this vulnerability immediately due to its high exploitability and potential for severe impact on data integrity and system availability. Regular security audits focusing on deserialization practices across all modules are recommended to prevent similar flaws from being introduced in future updates or custom extensions integrated with the Angio platform.