CVE-2022-43500 in WordPress
Summary
by MITRE • 12/05/2022
Cross-site scripting vulnerability in WordPress versions prior to 6.0.3 allows a remote unauthenticated attacker to inject an arbitrary script .
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Analysis
by VulDB Data Team • 12/26/2022
The vulnerability identified as CVE-2022-43500 represents a critical cross-site scripting flaw within WordPress core software affecting versions prior to 6.0.3. This security weakness resides in the content management system's handling of user input and output filtering mechanisms, creating an avenue for malicious actors to execute arbitrary scripts within the context of a victim's browser session. The vulnerability specifically impacts the WordPress administration interface and user-facing pages where content is processed and displayed, making it particularly dangerous due to the widespread adoption of WordPress across millions of websites worldwide.
The technical exploitation of this vulnerability occurs through improper sanitization of input data that flows into the web application's output rendering pipeline. Attackers can craft malicious payloads that, when processed by the vulnerable WordPress installation, get executed in the browsers of unsuspecting users who visit affected pages. This flaw operates under the Common Weakness Enumeration framework as CWE-79, which categorizes cross-site scripting vulnerabilities as weaknesses in input validation and output encoding. The vulnerability's classification aligns with ATT&CK technique T1566.001, which describes the use of malicious content delivery through web applications to compromise end-user systems.
The operational impact of CVE-2022-43500 extends beyond simple script injection, as it enables attackers to perform session hijacking, deface websites, redirect users to malicious domains, or even execute additional attacks through the compromised user sessions. Since the vulnerability does not require authentication, attackers can exploit it remotely without needing valid user credentials, making it particularly attractive for large-scale automated attacks. The widespread deployment of vulnerable WordPress versions across various industries including government, healthcare, and financial sectors amplifies the potential damage, as these organizations often store sensitive data and user information within their WordPress installations.
Mitigation strategies for this vulnerability primarily involve immediate upgrading to WordPress version 6.0.3 or later, which contains the necessary patches to address the input sanitization flaws. Organizations should also implement additional defensive measures including robust web application firewall rules, content security policy headers, and regular security audits of their WordPress installations. The patch addresses the root cause by strengthening input validation and output encoding mechanisms, ensuring that user-provided data cannot be executed as scripts within the application context. Security teams should also conduct comprehensive vulnerability assessments to identify any other potentially affected components within their WordPress environments and ensure proper monitoring for exploitation attempts.