CVE-2026-111828 in Classified Listing Plugin
Summary
by MITRE • 10/19/2026
Improper Validation of Specified Quantity in Input vulnerability in Mamunur Rashid Classified Listing classified-listing allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects Classified Listing: from n/a through 6.1.5.
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Analysis
by VulDB Data Team • 10/19/2026
The identified security flaw resides within the Mamunur Rashid Classified Listing plugin, specifically affecting versions ranging from an unspecified initial release up to version 6.1.5. This vulnerability is characterized by improper validation of specified quantities in user input, which directly facilitates a failure in access control mechanisms. The core technical issue stems from the application's inability to properly constrain functionality based on Access Control Lists or ACLs. In web applications and content management systems like WordPress, where this plugin operates, proper authorization checks are critical for ensuring that users can only perform actions intended for their specific privilege level. When input validation is insufficient, attackers can manipulate request parameters to bypass these restrictions, effectively elevating their privileges without authentication or by performing administrative tasks reserved for higher-privileged accounts.
From a technical perspective, the lack of robust server-side validation allows an attacker to inject malicious payloads into quantity fields or similar input vectors associated with classified listings. By manipulating these inputs, it is possible to trigger backend processes that are not adequately protected by ACLs. This misconfiguration means that functions requiring administrative oversight can be executed by unauthenticated users or lower-privileged contributors. The absence of strict boundary checks on the specified quantity creates an avenue for unauthorized state changes within the application database. Such actions may include creating, modifying, or deleting classified listings in ways that bypass standard permission workflows, thereby compromising the integrity and confidentiality of the data managed by the platform.
The operational impact of this vulnerability is significant, particularly for websites relying on user-generated content and e-commerce-like features through their classified listing functionality. Successful exploitation could lead to unauthorized access to sensitive administrative functions, allowing attackers to deface web pages, inject malicious scripts, or steal proprietary business information embedded within listings. Furthermore, the ability to bypass ACLs undermines trust in the platform's security model, potentially leading to data breaches and reputational damage for site administrators. In severe cases, this vulnerability could serve as a stepping stone for more complex attacks, such as remote code execution if other vulnerabilities are present or through cross-site scripting vectors enabled by the manipulated input fields.
To mitigate these risks, immediate action is required from system administrators and developers maintaining instances of the Mamunur Rashid Classified Listing plugin. The primary remediation strategy involves upgrading to a patched version of the plugin that addresses the improper validation logic and enforces strict access control checks on all relevant endpoints. Until an update is available or if patching is not immediately feasible, implementing web application firewall rules can help detect and block anomalous requests targeting quantity parameters with suspicious patterns. Additionally, enforcing principle of least privilege for user roles within the WordPress environment reduces the blast radius should exploitation occur. Regular security audits focusing on input validation and authorization checks are essential to prevent similar flaws in custom code or third-party integrations.
This vulnerability aligns with Common Weakness Enumeration (CWE) identifiers such as CWE-20, which covers Improper Input Validation, and CWE-862, which denotes Missing Authorization. In the context of the MITRE ATT&CK framework, this flaw facilitates techniques related to Privilege Escalation and Accessing Remote Services without proper authentication constraints. Understanding these mappings helps security teams categorize the risk accurately within their broader threat intelligence frameworks. By addressing both the input validation deficiency and the underlying access control failures, organizations can restore a robust security posture for their classified listing applications. Continuous monitoring of plugin updates and adherence to secure coding standards remain vital defenses against such persistent threats in dynamic web environments.