CVE-2024-37523 in Login Logo Editor Plugin
Summary
by MITRE • 07/21/2024
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in AMP-MODE Login Logo Editor allows Stored XSS.This issue affects Login Logo Editor: from n/a through 1.3.3.
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Analysis
by VulDB Data Team • 03/17/2025
This vulnerability represents a critical cross-site scripting flaw in the AMP-MODE Login Logo Editor plugin, specifically targeting the stored XSS attack vector through improper input neutralization during web page generation. The weakness exists within the plugin's handling of user-supplied data when processing login logo configurations, creating an environment where malicious scripts can be persistently injected and executed within the context of authenticated users' browsers. The vulnerability affects all versions from the initial release through version 1.3.3, indicating a long-standing flaw that has remained unaddressed in the plugin's input validation mechanisms.
The technical implementation of this vulnerability stems from the plugin's failure to properly sanitize or escape user input when storing and subsequently rendering login logo configurations. When administrators or users upload or modify logo images through the plugin's interface, the system does not adequately filter or encode the input data before storing it in the database. This allows attackers to inject malicious JavaScript code within the logo upload process, which then gets stored and executed whenever the affected web page is rendered. The stored nature of this vulnerability means that the malicious payload persists across multiple user sessions and page views, amplifying the potential impact beyond a single interaction.
The operational impact of this vulnerability extends beyond simple script execution, as it creates a persistent backdoor for attackers to compromise user sessions and potentially escalate privileges within the affected WordPress environment. Attackers can leverage this vulnerability to execute arbitrary JavaScript code in the context of authenticated users, potentially stealing session cookies, modifying user data, or redirecting users to malicious websites. This stored XSS vulnerability particularly threatens administrative users who interact with the login page, as successful exploitation could lead to complete compromise of the WordPress installation. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a classic example of how insufficient input validation can create persistent security weaknesses.
Mitigation strategies for this vulnerability should prioritize immediate patching of the affected plugin to version 1.3.4 or later, which should contain the necessary input sanitization fixes. Organizations should implement comprehensive input validation measures including strict sanitization of all user-supplied data, proper HTML escaping before rendering content, and content security policy implementations to limit script execution. Network-level protections such as web application firewalls can provide additional defense-in-depth, though these should not replace proper code-level fixes. Security monitoring should be enhanced to detect unusual logo upload activities, and regular security audits should be conducted to identify similar input handling vulnerabilities across the entire WordPress ecosystem. The vulnerability demonstrates the critical importance of proper input sanitization in web applications, as outlined in the OWASP Top Ten and various ATT&CK framework techniques related to command injection and script execution in web applications.