CVE-2026-39729 in Edwiser Bridge Plugin
Summary
by MITRE • 10/06/2026
Unauthenticated Sensitive Data Exposure in Edwiser Bridge <= 4.3.4 versions.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as an unauthenticated sensitive data exposure within Edwiser Bridge versions prior to or equal to 4.3.4 represents a critical security flaw that allows attackers to access confidential information without requiring valid credentials. This type of issue typically stems from improper access control mechanisms on the server side, where API endpoints or administrative functions fail to adequately verify the identity and permissions of the requesting user before returning data. In the context of WordPress plugins like Edwiser Bridge, which facilitates integration between Moodle and WooCommerce, such flaws can expose student records, transaction histories, course enrollments, and potentially personally identifiable information (PII) including names, email addresses, and payment details to any internet-facing actor with basic network connectivity.
From a technical perspective, the root cause often involves missing or bypassed authentication checks on specific REST API endpoints or AJAX handlers exposed by the plugin. Attackers can exploit this by crafting malicious HTTP requests that target these unprotected routes directly. Because the vulnerability is unauthenticated, it does not require session hijacking, credential stuffing, or privilege escalation to execute, significantly lowering the barrier for entry and increasing the likelihood of automated exploitation at scale. The flaw aligns closely with CWE-200: Information Exposure, specifically falling under categories such as Unintended Info Exposure (CWE-209) or Improper Access Control (CWE-284). This misconfiguration allows external entities to retrieve data that should be restricted to authenticated administrators or enrolled users only.
The operational impact of this vulnerability is severe due to the sensitive nature of the data typically handled by educational and e-commerce platforms. Exposure of student personal information can lead to identity theft, phishing attacks targeting students and staff, and violations of privacy regulations such as GDPR in Europe or FERPA in the United States. For institutions relying on Edwiser Bridge for financial transactions via WooCommerce, exposure of order details could facilitate fraud or social engineering campaigns against both customers and administrators. Furthermore, the availability of this data can aid attackers in further reconnaissance efforts, allowing them to map out user roles, identify high-value targets within an organization, and plan more sophisticated attacks such as targeted phishing or account takeover attempts using leaked contact information.
Mitigation strategies must prioritize immediate remediation through software updates. Administrators running Edwiser Bridge versions 4.3.4 or lower should upgrade to the latest patched version released by the vendor, which implements proper authentication checks on all sensitive endpoints. In cases where an update cannot be applied immediately due to compatibility constraints with other plugins or custom code modifications, temporary mitigations include restricting access to WordPress admin-ajax.php and REST API routes via web application firewall rules that require valid nonces for specific actions. Additionally, implementing strict rate limiting can help mitigate automated scanning attempts, although this is not a substitute for fixing the underlying authorization logic. Regular security audits of third-party plugins are essential to ensure they adhere to secure coding standards and do not introduce similar vulnerabilities into the WordPress ecosystem.