CVE-2026-66442 in YayPricing Plugin
Summary
by MITRE • 07/27/2026
Subscriber Broken Access Control in YayPricing <= 3.5.6 versions.
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Analysis
by VulDB Data Team • 07/27/2026
The vulnerability under discussion represents a critical broken access control issue within the YayPricing plugin versions 3.5.6 and earlier, which fundamentally undermines the security model of the affected system. This weakness allows unauthorized users to bypass intended access restrictions and gain privileges typically reserved for legitimate administrators or authorized personnel. The flaw exists at the core of the application's authentication and authorization mechanisms, creating a pathway for malicious actors to escalate their privileges within the system.
This broken access control vulnerability stems from inadequate validation of user permissions and roles within the plugin's codebase. Specifically, the application fails to properly verify whether a requesting user possesses sufficient authorization to perform certain administrative actions or access restricted resources. The technical implementation likely contains insufficient input sanitization and role-based access controls that permit unauthorized operations through predictable API endpoints or direct manipulation of request parameters. Such flaws typically arise from improper session management, weak authentication checks, or flawed privilege verification routines that do not adequately distinguish between different user roles.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential data breaches, system compromise, and complete loss of administrative control over the affected platform. An attacker exploiting this weakness could manipulate pricing configurations, modify user accounts, access sensitive customer data, or even execute arbitrary code within the application environment. The consequences are particularly severe in e-commerce contexts where pricing information directly impacts business revenue and customer trust. This vulnerability also creates opportunities for lateral movement within network environments, as compromised systems often serve as launch points for broader attacks against interconnected services.
Mitigation strategies should focus on implementing robust access control mechanisms that adhere to established security frameworks such as those defined in the CWE catalog under category 285 for improper authorization and CWE 798 for hardcoded credentials. Organizations must ensure comprehensive input validation, implement proper role-based access controls, and conduct regular security assessments of third-party plugins and components. The recommended remediation includes upgrading to patched versions of YayPricing, implementing strict authentication checks at every request point, and establishing monitoring systems to detect unauthorized access attempts. Additionally, following ATT&CK framework recommendations for privilege escalation techniques would help identify and prevent exploitation patterns commonly associated with such access control vulnerabilities.
Security teams should also consider implementing network segmentation to limit the blast radius of potential compromises, establish automated patch management processes for third-party components, and maintain detailed audit logs to track user activities that could indicate exploitation attempts. The vulnerability highlights the importance of continuous security testing and proper security hygiene practices when integrating external software solutions into production environments. Organizations must prioritize regular security assessments of all installed plugins and applications to identify and remediate similar access control weaknesses before they can be exploited by malicious actors.