CVE-2025-22550 in Mobile Detect Plugin
Summary
by MITRE • 01/07/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in AddFunc AddFunc Mobile Detect allows Stored XSS.This issue affects AddFunc Mobile Detect: from n/a through 3.1.
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Analysis
by VulDB Data Team • 02/15/2025
The vulnerability CVE-2025-22550 represents a critical cross-site scripting flaw in the AddFunc Mobile Detect plugin that enables stored XSS attacks. This issue stems from inadequate input sanitization during web page generation processes, creating a persistent security weakness that can be exploited by attackers to inject malicious scripts into web applications. The vulnerability specifically affects versions of AddFunc Mobile Detect ranging from the initial release through version 3.1, indicating a prolonged period during which the flaw remained unaddressed. The improper neutralization of input occurs when user-supplied data is not properly validated or escaped before being incorporated into dynamically generated web content, allowing attackers to store malicious payloads that execute in the context of other users' browsers.
The technical exploitation of this vulnerability follows the established patterns of stored XSS attacks as categorized under CWE-79, which addresses the improper neutralization of input during web page generation. Attackers can leverage this weakness by injecting malicious JavaScript code through input fields or parameters that are then stored within the application's database or configuration files. When other users view pages that contain this stored content, their browsers execute the malicious scripts, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The attack vector is particularly concerning because it operates at the application layer, where the malicious code can persist across multiple user sessions and interactions, making it difficult to detect and remediate.
The operational impact of this vulnerability extends beyond immediate security breaches to encompass broader system integrity concerns. Organizations using AddFunc Mobile Detect in their web applications face significant risks including unauthorized access to user sessions, data exfiltration, and potential compromise of entire user bases. The stored nature of the vulnerability means that even after the initial injection, the malicious code continues to execute automatically whenever affected pages are loaded, creating a persistent threat that can be leveraged for extended periods without additional user interaction. This characteristic aligns with ATT&CK technique T1566.001 for credential access through spearphishing attachments and T1071.001 for application layer protocol usage, as the vulnerability can be exploited to establish persistent access to user accounts and system resources.
Mitigation strategies for CVE-2025-22550 must address both immediate remediation and long-term security hardening measures. Organizations should prioritize updating to the latest version of AddFunc Mobile Detect where the XSS vulnerability has been patched, while also implementing comprehensive input validation and output encoding mechanisms throughout their web applications. The implementation of Content Security Policy headers can provide additional protection against XSS attacks by restricting script execution sources, and regular security testing including automated scanning and manual penetration testing should be conducted to identify similar vulnerabilities. Security teams should also establish monitoring procedures to detect anomalous user behavior or unexpected content modifications that might indicate exploitation attempts, while maintaining detailed audit logs of all input processing activities to support forensic analysis if incidents occur.