CVE-2025-57950 in Plugin Security Scanner Plugin
Summary
by MITRE • 09/22/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Glen Scott Plugin Security Scanner allows Stored XSS. This issue affects Plugin Security Scanner: from n/a through 2.0.2.
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Analysis
by VulDB Data Team • 09/22/2025
The CVE-2025-57950 vulnerability represents a critical cross-site scripting flaw within the Glen Scott Plugin Security Scanner, specifically targeting the web page generation process where input validation mechanisms fail to properly sanitize user-supplied data. This weakness enables attackers to inject malicious scripts that persist within the application's storage system, making it a stored cross-site scripting vulnerability rather than a reflected or DOM-based variant. The affected version range spans from an unspecified initial state through version 2.0.2, indicating that the flaw has existed for multiple releases and potentially affected a significant user base. The vulnerability resides in the plugin's handling of input during web page construction, where insufficient sanitization allows malicious payloads to be stored and subsequently executed when other users view the affected pages.
The technical exploitation of this vulnerability follows the established patterns of stored XSS attacks where malicious script code is first submitted through a vulnerable input field or parameter and then stored within the application's database or file system. When legitimate users access pages containing this stored malicious content, their browsers execute the injected scripts within the context of the vulnerable application, potentially compromising user sessions, stealing cookies, or redirecting users to malicious sites. This vulnerability directly maps to CWE-79, which defines the improper neutralization of input during web page generation as a fundamental weakness in web application security. The flaw demonstrates poor input validation and output encoding practices that violate core security principles for preventing XSS attacks.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with persistent access to user sessions and potentially sensitive data within the application environment. An attacker could leverage this vulnerability to perform actions on behalf of authenticated users, escalate privileges, or extract confidential information from the plugin's security scanning results. The persistent nature of stored XSS means that once the malicious payload is injected, it remains active until manually removed from the system, allowing attackers to maintain long-term access to the affected environment. This vulnerability particularly impacts the security scanner's integrity since it undermines the trustworthiness of the application's own security monitoring capabilities.
Mitigation strategies for CVE-2025-57950 should prioritize immediate patching of the affected plugin to version 2.0.3 or later, where the input sanitization mechanisms have been properly implemented. Organizations should also implement additional defensive measures including comprehensive input validation, output encoding, and content security policies to reduce the impact of similar vulnerabilities. Security teams should conduct thorough audits of all web applications to identify potential input fields that may be vulnerable to similar stored XSS attacks, particularly in areas where user-generated content is stored and displayed. The implementation of web application firewalls and regular security scanning should be enhanced to detect and prevent such injection attempts. Additionally, developers should adopt secure coding practices that align with OWASP Top Ten recommendations and ATT&CK framework techniques for preventing input validation flaws and cross-site scripting vulnerabilities in web applications.