CVE-2023-26527 in Debug Assistant Plugin
Summary
by MITRE • 06/16/2023
Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in WPIndeed Debug Assistant plugin <= 1.4 versions.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/14/2023
The CVE-2023-26527 vulnerability represents a critical security flaw in the WPIndeed Debug Assistant WordPress plugin affecting versions 1.4 and earlier. This vulnerability specifically targets authenticated administrators and higher privilege users within the WordPress ecosystem, making it particularly dangerous as it exploits the trust relationship between the administrator and the plugin. The vulnerability manifests as a stored cross-site scripting flaw that allows authenticated attackers with administrative privileges to inject malicious scripts into the plugin's administrative interface, which then executes when other administrators or privileged users view the affected pages.
The technical implementation of this vulnerability stems from insufficient input validation and output sanitization within the plugin's handling of user-supplied data. When administrators interact with the debug assistant functionality, the plugin fails to properly sanitize or escape user-controllable parameters before storing them in the database and subsequently rendering them in the administrative interface. This stored XSS condition creates a persistent threat vector where malicious scripts can be executed in the context of other administrators' browsers, potentially leading to complete compromise of the WordPress installation.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the ability to manipulate the administrative interface, steal session cookies, perform unauthorized actions, and potentially escalate privileges within the WordPress environment. Attackers could leverage this vulnerability to modify plugin settings, access sensitive debug information, or even inject additional malicious code that could persist across multiple administrator sessions. The stored nature of the vulnerability means that once exploited, the malicious payload remains active until manually removed from the database, creating a long-term threat vector.
Security professionals should recognize this vulnerability as a classic example of CWE-79: Improper Neutralization of Input During Web Page Generation, which falls under the broader category of web application security flaws that require robust input validation and output encoding mechanisms. The vulnerability aligns with ATT&CK technique T1566.002: Phishing via Service, as it represents a method by which attackers can gain administrative access through compromised plugin functionality. Organizations should immediately implement mitigation strategies including updating to the latest version of the WPIndeed Debug Assistant plugin, implementing proper input validation measures, and monitoring for suspicious administrative activities that may indicate exploitation attempts.
Mitigation efforts must include immediate patching of the affected plugin to version 1.5 or later, which should contain proper sanitization and validation controls. Additionally, administrators should conduct thorough security audits of their WordPress installations to identify any other potentially vulnerable plugins or themes that may exhibit similar stored XSS vulnerabilities. Network monitoring should be enhanced to detect unusual administrative activities, and security teams should consider implementing Content Security Policy (CSP) headers to provide additional protection against script injection attacks. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar weaknesses in the WordPress ecosystem, particularly focusing on administrative interfaces that handle user-supplied data.