CVE-2022-2934 in Beaver Builder
Summary
by MITRE • 09/06/2022
The Beaver Builder – WordPress Page Builder for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Image URL' value found in the Media block in versions up to, and including, 2.5.5.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with access to the Beaver Builder editor to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 10/13/2022
The vulnerability CVE-2022-2934 affects the Beaver Builder WordPress page builder plugin, specifically targeting versions up to and including 2.5.5.2. This represents a critical security flaw that exploits stored cross-site scripting mechanisms within the Media block functionality. The vulnerability stems from inadequate input sanitization and output escaping measures implemented within the plugin's codebase, creating an exploitable vector for malicious actors who possess legitimate access to the Beaver Builder editor interface.
The technical flaw manifests when authenticated attackers with sufficient privileges manipulate the 'Image URL' parameter within the Media block, allowing them to inject malicious JavaScript code that persists in the database. This stored payload executes whenever any user accesses pages containing the compromised content, making it particularly dangerous as the attack vector becomes active upon page load without requiring additional user interaction. The vulnerability operates under CWE-79 which classifies stored cross-site scripting as a weakness where untrusted data is stored and later executed as part of web content.
From an operational perspective, this vulnerability creates significant risk for WordPress sites utilizing Beaver Builder, as it enables attackers to execute arbitrary scripts in the context of any user's browser who visits affected pages. The attack requires only authenticated access to the Beaver Builder editor, which may be granted to administrators, editors, or other privileged users, making the exploitation relatively straightforward in compromised environments. This threat model aligns with ATT&CK technique T1566.001 which covers social engineering via malicious content injection.
The impact extends beyond simple script execution, as attackers can potentially perform session hijacking, deface websites, steal user credentials, or redirect victims to malicious domains. The vulnerability's persistence in the database means that the malicious code remains active until manually removed or the plugin is updated, creating an ongoing threat vector. Organizations using this plugin face potential data breaches, reputational damage, and compliance violations, particularly in environments where privileged access is not adequately controlled or monitored. Mitigation strategies should include immediate plugin updates to versions that address this vulnerability, implementation of strict access controls for Beaver Builder editor access, and regular security auditing of content management systems.