CVE-2023-3947 in Video Conferencing with Zoom Plugin
Summary
by MITRE • 07/26/2023
The Video Conferencing with Zoom plugin for WordPress is vulnerable to Sensitive Information Exposure due to hardcoded encryption key on the 'vczapi_encrypt_decrypt' function in versions up to, and including, 4.2.1. This makes it possible for unauthenticated attackers to decrypt and view the meeting id and password.
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Analysis
by VulDB Data Team • 04/10/2026
The vulnerability identified as CVE-2023-3947 affects the Video Conferencing with Zoom plugin for WordPress, representing a critical security flaw that compromises the confidentiality of sensitive meeting data. This issue stems from a hardcoded encryption key within the plugin's codebase, specifically within the 'vczapi_encrypt_decrypt' function, which exists in all versions up to and including 4.2.1. The flaw allows unauthenticated attackers to exploit the encryption mechanism and decrypt sensitive information including meeting IDs and passwords, effectively undermining the security posture of video conferencing sessions managed through this WordPress plugin.
The technical implementation of this vulnerability demonstrates a fundamental flaw in cryptographic key management practices, aligning with CWE-312 - Cleartext Storage of Sensitive Information and CWE-327 - Use of a Broken or Risky Cryptographic Algorithm. The hardcoded encryption key represents a classic example of weak cryptographic implementation where the secret key is embedded directly within the source code rather than being dynamically generated or securely managed. This approach violates established security principles and creates a persistent vulnerability that remains exploitable across all affected versions of the plugin.
From an operational perspective, this vulnerability exposes organizations to significant risks including unauthorized access to video conference sessions, potential data breaches, and compromise of sensitive business communications. Attackers can leverage this flaw to gain access to meeting details without requiring authentication credentials, potentially leading to meeting hijacking, eavesdropping on confidential discussions, and unauthorized participation in business-critical video conferences. The impact extends beyond individual meetings to potentially compromise entire organizational communication channels that rely on this plugin for video conferencing functionality.
The exploitation of this vulnerability follows standard attack patterns consistent with ATT&CK technique T1566 - Phishing, where attackers can use the exposed meeting information to conduct targeted attacks or gain unauthorized access to sensitive business communications. Organizations using affected versions of the plugin should immediately implement mitigation strategies including updating to the latest plugin version where the hardcoded key has been removed or replaced with a secure dynamic key generation mechanism. Additionally, administrators should conduct thorough security assessments of their WordPress installations to identify any other instances of hardcoded credentials or encryption keys that may present similar vulnerabilities. The remediation process should also include monitoring for any unauthorized access attempts or suspicious activities related to video conferencing systems, as the exposure of meeting IDs and passwords creates a window of opportunity for attackers to exploit these credentials across multiple sessions and time periods.