CVE-2022-2299 in Allow SVG Files Plugin
Summary
by MITRE • 07/25/2022
The Allow SVG Files WordPress plugin through 1.1 does not sanitise uploaded SVG files, which could allow users with a role as low as Author to upload a malicious SVG containing XSS payloads
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Analysis
by VulDB Data Team • 07/26/2022
The CVE-2022-2299 vulnerability affects the Allow SVG Files WordPress plugin version 1.1 and earlier, representing a critical security flaw that undermines the platform's content security measures. This vulnerability specifically targets the plugin's failure to properly sanitize uploaded SVG files, creating an avenue for malicious actors to exploit the system through a relatively low-privileged user role. The issue stems from inadequate input validation and sanitization mechanisms within the plugin's file upload handling process, which should have prevented the execution of potentially harmful code within SVG files.
The technical implementation of this vulnerability allows users with the Author role to upload malicious SVG files containing cross-site scripting payloads without proper security checks. This flaw directly violates the principle of least privilege and demonstrates a failure in the WordPress plugin's security architecture. When an SVG file is uploaded, the system should validate its content against a strict whitelist of allowed elements and attributes, but instead accepts potentially dangerous code that could execute when the file is rendered in web browsers. The vulnerability is particularly concerning because SVG files are often treated as safe content and are frequently rendered directly in web browsers without additional security filtering.
The operational impact of CVE-2022-2299 extends beyond simple XSS execution, as it provides attackers with a potential foothold for more sophisticated attacks within the WordPress environment. An attacker could leverage this vulnerability to execute malicious scripts in the context of authenticated users' browsers, potentially leading to session hijacking, data theft, or privilege escalation within the WordPress system. The vulnerability aligns with CWE-79 Cross-site Scripting (XSS) and follows attack patterns documented in the MITRE ATT&CK framework under T1211 Lateral Movement and T1059 Command and Scripting Interpreter. The ability to upload malicious SVG files through an Author-level account undermines the security model of WordPress, where user roles should have clearly defined and limited capabilities.
Organizations affected by this vulnerability should immediately implement mitigations including plugin updates to versions that address the sanitization issue, implementing additional security measures such as Content Security Policy headers, and conducting thorough audits of uploaded content. The recommended approach involves updating to the latest plugin version that properly sanitizes SVG files, implementing strict file type validation, and considering additional layers of security such as Web Application Firewall rules that can detect and block suspicious SVG content. Security teams should also monitor for potential exploitation attempts through automated scanning tools and ensure that proper access controls are maintained to prevent unauthorized users from uploading files to the system.