CVE-2022-36285 in Uploading SVG, WEBP and ICO Files Plugin
Summary
by MITRE • 08/23/2022
Authenticated Arbitrary File Upload vulnerability in dmitrylitvinov Uploading SVG, WEBP and ICO files plugin <= 1.0.1 at WordPress.
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Analysis
by VulDB Data Team • 08/24/2022
The authenticated arbitrary file upload vulnerability identified as CVE-2022-36285 affects the uploading svg webp and ico files plugin for WordPress versions up to and including 1.0.1. This vulnerability represents a critical security flaw that allows authenticated users with minimal privileges to upload malicious files to the target system. The issue stems from inadequate input validation and sanitization mechanisms within the plugin's file upload functionality, specifically when processing vector graphics and image format files. The vulnerability is categorized under CWE-434 which defines insecure file upload handling as a common weakness in web applications. Attackers can exploit this flaw to upload potentially harmful files such as php scripts, javascript payloads, or other malicious content that could be executed within the context of the web server.
The technical exploitation of this vulnerability requires an authenticated user account within the WordPress environment, typically with contributor or author level permissions. Once authenticated, the attacker can leverage the plugin's file upload interface to submit malicious files that bypass the intended security checks. The vulnerability is particularly concerning because SVG files, WEBP images, and ICO formats are commonly used in web applications and may not trigger the same security filters as traditional executable file types. The plugin fails to properly validate file extensions, content types, or file headers, allowing attackers to upload files with extensions that disguise malicious content. This weakness creates an attack surface that aligns with ATT&CK technique T1505.003 for server-side include injection and T1566.001 for spearphishing attachment, as the malicious files could be used to establish persistent access or deliver additional payloads.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with a means to compromise the entire WordPress installation. Successful exploitation could lead to complete system compromise through remote code execution, data exfiltration, or the establishment of backdoors. The vulnerability affects all WordPress installations running the affected plugin version, potentially impacting thousands of websites that have not updated their security measures. Organizations may experience significant downtime, data breaches, or reputational damage as attackers can leverage this vulnerability to gain persistent access to their systems. The risk is amplified because the plugin's functionality is typically enabled for content creators and contributors who may not have extensive security training, making the attack vector more accessible. Furthermore, the vulnerability could be exploited in combination with other weaknesses within the WordPress ecosystem, potentially leading to privilege escalation or lateral movement within the network infrastructure.
Mitigation strategies for CVE-2022-36285 should prioritize immediate plugin updates to versions that address the file upload validation issues. Organizations must implement comprehensive security measures including input validation, file type restrictions, and content sanitization processes. The WordPress security team recommends disabling the vulnerable plugin until a patched version is available, while also implementing network-level restrictions to prevent unauthorized file uploads. Additional protective measures include configuring web server rules to block execution of uploaded files in web-accessible directories, implementing proper file permissions, and establishing regular security audits of installed plugins. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious upload activities. The vulnerability highlights the importance of maintaining updated security practices and demonstrates how even minor plugin features can create significant security risks when proper validation mechanisms are not implemented. Security teams must also conduct thorough penetration testing to identify similar vulnerabilities in other plugins or custom code implementations within their WordPress environments.