CVE-2026-59534 in Post My CF7 Form Plugin
Summary
by MITRE • 07/27/2026
Unauthenticated Broken Access Control in Post My CF7 Form <= 6.2.0 versions.
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Analysis
by VulDB Data Team • 07/27/2026
The vulnerability identified in Post My CF7 Form plugin versions up to 6.2.0 represents a critical broken access control issue that allows unauthorized users to bypass authentication mechanisms and gain access to restricted administrative functions. This flaw falls under the CWE-284 access control weakness category, specifically targeting improper access control within web applications. The vulnerability stems from insufficient validation of user permissions and authentication status when processing requests to the plugin's backend endpoints. Attackers can exploit this weakness by sending crafted requests directly to the plugin's APIs without requiring valid login credentials or administrative privileges.
The technical implementation of this vulnerability occurs due to missing or inadequate authentication checks within the plugin's codebase, particularly in functions that handle form submissions, data retrieval, and administrative operations. The plugin fails to properly verify whether incoming requests originate from authenticated administrators or if they possess the necessary permissions to perform specific actions. This allows malicious actors to manipulate API endpoints designed for authorized users only, potentially enabling them to access sensitive configuration data, modify form settings, or even execute arbitrary code on the affected WordPress installation. The vulnerability is particularly dangerous because it operates at the application layer where authentication controls should be enforced.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can lead to complete compromise of the WordPress site when combined with other exploitation techniques. An attacker who successfully exploits this broken access control weakness can potentially escalate privileges and gain full administrative control over the affected system. This scenario aligns with ATT&CK technique T1078 legitimate credentials, where attackers leverage valid accounts or access tokens to perform unauthorized actions within the system. The vulnerability also enables data exfiltration, modification of critical website content, and potential establishment of persistent backdoors through form manipulation capabilities. Additionally, the compromised site may serve as a launching point for further attacks against the broader network infrastructure.
Mitigation strategies should focus on immediate plugin updates to versions that address this access control weakness, as well as implementing additional security measures such as web application firewalls to monitor and block suspicious API requests. Organizations should also conduct thorough security audits of their WordPress installations to identify other potential access control vulnerabilities and ensure proper authentication mechanisms are in place across all administrative interfaces. Network segmentation and monitoring solutions should be deployed to detect unusual access patterns that might indicate exploitation attempts. The remediation process must include verification that all endpoints properly validate user authentication status and implement appropriate authorization checks before executing privileged operations, aligning with security best practices outlined in the OWASP Top Ten and NIST cybersecurity frameworks for web application security.