CVE-2025-39591 in WP Subscription Forms Plugin
Summary
by MITRE • 04/16/2025
Missing Authorization vulnerability in WP Shuffle WP Subscription Forms allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects WP Subscription Forms: from n/a through 1.2.3.
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Analysis
by VulDB Data Team • 04/16/2025
The vulnerability identified as CVE-2025-39591 represents a critical missing authorization flaw within the WP Shuffle WP Subscription Forms plugin, which operates within the WordPress ecosystem. This security weakness stems from incorrectly configured access control mechanisms that fail to properly validate user permissions before granting access to sensitive administrative functions. The vulnerability specifically impacts versions of the plugin ranging from the initial release through version 1.2.3, indicating a widespread exposure across multiple iterations of the software. The issue manifests when the plugin fails to enforce proper authorization checks, allowing unauthorized users to perform actions they should not be permitted to execute based on their roles and privileges.
The technical implementation of this vulnerability falls under the CWE-285 category of Improper Authorization, which is classified as a fundamental access control weakness in software systems. This flaw enables attackers to exploit the plugin's administrative interfaces without possessing the necessary credentials or elevated privileges typically required for such operations. The missing authorization check creates a pathway for privilege escalation attacks where malicious actors can manipulate the plugin's functionality to gain unauthorized access to subscription management features, form configurations, and potentially sensitive user data. This misconfiguration directly violates the principle of least privilege and demonstrates inadequate input validation and access control enforcement within the plugin's codebase.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can enable attackers to manipulate subscription forms, modify user data, and potentially compromise the integrity of the entire WordPress installation. Attackers could leverage this flaw to modify subscription tiers, alter form configurations, or even exfiltrate sensitive user information collected through the subscription forms. The vulnerability's persistence across multiple versions suggests that the underlying access control implementation has fundamental design flaws that were not properly addressed during the plugin's development lifecycle. This exposure creates a significant risk for WordPress sites using the affected plugin, particularly those that handle sensitive user information or financial transactions through subscription mechanisms.
Mitigation strategies for CVE-2025-39591 should prioritize immediate plugin updates to versions that address the authorization flaw, as this represents the most direct solution to the vulnerability. System administrators must also implement additional security measures including regular security audits of WordPress plugins, monitoring for unauthorized administrative activities, and ensuring proper role-based access controls are configured within the WordPress environment. The vulnerability aligns with ATT&CK technique T1078.004 which involves legitimate credentials and privileges, as attackers can exploit this flaw to gain unauthorized access through seemingly legitimate administrative interfaces. Organizations should also consider implementing network segmentation, intrusion detection systems, and comprehensive monitoring of administrative activities to detect potential exploitation attempts. Given the nature of this vulnerability, it is essential to conduct thorough security assessments of all WordPress installations to identify other potentially affected plugins and ensure that proper access control mechanisms are in place throughout the entire application stack.