CVE-2024-12275 in Canvasflow Plugin
Summary
by MITRE • 01/31/2025
The Canvasflow for WordPress plugin through 1.5.5 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.
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Analysis
by VulDB Data Team • 05/14/2025
The Canvasflow for WordPress plugin version 1.5.5 contains a critical reflected cross-site scripting vulnerability that poses significant security risks to high-privilege users. This vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's codebase, specifically affecting how parameters are handled before being rendered back to users. The flaw exists in the plugin's processing of user-supplied input that is subsequently reflected in the web page without proper validation or encoding, creating an exploitable condition that can be leveraged by malicious actors.
The technical implementation of this vulnerability involves the plugin's failure to properly sanitize user-controllable parameters before incorporating them into HTML output. When a user interacts with the plugin, particularly through URL parameters or form inputs, the system accepts these values without adequate sanitization measures. The reflected nature of this XSS means that an attacker can craft a malicious URL containing script code that gets executed in the victim's browser when the page is loaded. This particular vulnerability is especially concerning because it targets high-privilege users such as administrators, making it a prime candidate for privilege escalation attacks. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and it maps to ATT&CK technique T1566.001 which covers the use of malicious links in phishing attacks.
The operational impact of this vulnerability extends beyond simple script execution, as it creates potential pathways for attackers to compromise administrative accounts and gain unauthorized access to sensitive systems. When an administrator clicks on a maliciously crafted link, the reflected script could steal session cookies, redirect users to malicious sites, or perform actions on behalf of the authenticated user. This makes the vulnerability particularly dangerous in environments where administrators frequently click on links or where the plugin is widely used across multiple sites. The risk is amplified because the vulnerability affects users with elevated privileges, potentially allowing attackers to execute arbitrary code with administrative rights, leading to complete system compromise.
Mitigation strategies for this vulnerability should include immediate patching of the Canvasflow plugin to version 1.5.6 or later, which contains the necessary sanitization fixes. Administrators should also implement proper input validation at multiple layers, ensuring that all user-supplied parameters are properly escaped before being rendered in HTML output. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, though they should not be relied upon as the sole mitigation. Regular security audits and monitoring for suspicious user activity, particularly around plugin usage and URL parameters, can help detect potential exploitation attempts. The vulnerability also highlights the importance of implementing comprehensive security practices including principle of least privilege, regular security updates, and proper code review processes that specifically address input validation and output encoding requirements. Organizations should also consider implementing Content Security Policy headers to limit the execution of unauthorized scripts and reduce the potential impact of successful XSS attacks.