CVE-2022-0892 in Export All URLs Plugin
Summary
by MITRE • 04/11/2022
The Export All URLs WordPress plugin before 4.2 does not sanitise and escape the CSV filename before outputting it back in the page, leading to a Reflected Cross-Site Scripting
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Analysis
by VulDB Data Team • 04/13/2022
The vulnerability identified as CVE-2022-0892 affects the Export All URLs WordPress plugin version 4.1 and earlier, representing a critical security flaw that exposes users to reflected cross-site scripting attacks. This issue stems from inadequate input validation and output sanitization within the plugin's CSV filename handling mechanism, creating an exploitable vector for malicious actors to inject and execute arbitrary JavaScript code within users' browsers. The vulnerability specifically manifests when the plugin processes CSV filenames that are not properly sanitized before being rendered back to the user interface, allowing attackers to craft malicious inputs that persist in the page output.
The technical implementation of this vulnerability aligns with CWE-79 which defines Cross-Site Scripting as a condition where an application includes untrusted data in a new web page without proper validation or escaping, or without the use of security headers. The flaw operates through a reflected XSS pattern where malicious script code embedded in the CSV filename parameter gets executed when the page containing the filename is rendered. This occurs because the plugin fails to apply appropriate HTML escaping or sanitization techniques to the filename before incorporating it into the page's HTML structure, directly violating secure coding practices recommended by OWASP and the Web Application Security Consortium.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform various malicious activities including session hijacking, credential theft, defacement of the affected WordPress site, and potential lateral movement within the compromised environment. An attacker could craft a malicious CSV filename containing JavaScript payloads that would execute when administrators or other users view the exported URLs page, potentially stealing cookies, redirecting users to phishing sites, or injecting additional malicious code. The reflected nature of the vulnerability means that the attack vector does not require persistent storage of malicious content, making it particularly dangerous as it can be delivered through various attack vectors including social engineering, compromised links, or automated scanning tools.
Security professionals should prioritize immediate remediation of this vulnerability by upgrading to version 4.2 or later of the Export All URLs plugin, which implements proper input sanitization and output escaping mechanisms. Additionally, administrators should conduct comprehensive security audits of their WordPress installations to identify any other plugins or themes that may exhibit similar vulnerabilities in their input handling and output rendering processes. The mitigation strategy should include implementing Content Security Policy headers to reduce the impact of potential XSS attacks, enabling proper input validation at multiple layers of the application, and establishing regular security scanning procedures to detect similar issues in other third-party components. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts targeting this specific vulnerability pattern.