CVE-2025-52771 in Video Expander Plugin
Summary
by MITRE • 08/14/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bcupham Video Expander allows Stored XSS. This issue affects Video Expander: from n/a through 1.0.
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Analysis
by VulDB Data Team • 08/14/2025
The vulnerability identified as CVE-2025-52771 represents a critical cross-site scripting flaw within the bcupham Video Expander plugin, specifically categorized under CWE-79 Improper Neutralization of Input During Web Page Generation. This weakness enables attackers to inject malicious scripts into web pages viewed by other users, creating a persistent security risk that can compromise user sessions and data integrity. The vulnerability exists in the plugin's handling of user input during web page generation processes, where insufficient sanitization allows malicious payloads to be stored and subsequently executed in the context of other users' browsers. The affected version range spans from an unknown starting point through version 1.0, indicating that all iterations within this scope are potentially vulnerable to this stored XSS attack vector.
The technical exploitation of this vulnerability occurs when malicious input is accepted and stored within the plugin's database or configuration files without proper sanitization or encoding. When other users access web pages generated by the plugin, their browsers execute the stored malicious scripts, which can perform actions such as stealing session cookies, redirecting users to malicious sites, or modifying page content. The stored nature of this XSS vulnerability means that the malicious payload persists even after the initial injection, making it particularly dangerous as it can affect multiple users over extended periods. Attackers can leverage this weakness to establish persistent footholds within affected systems, potentially escalating privileges or accessing sensitive user data through session hijacking techniques.
The operational impact of CVE-2025-52771 extends beyond simple script execution, as it creates opportunities for attackers to conduct more sophisticated attacks within the compromised environment. Users who interact with the affected plugin may unknowingly execute malicious code that can harvest credentials, monitor user activities, or establish command and control channels. The vulnerability's presence in the Video Expander plugin suggests that any user-facing content or configuration parameters processed by this component could serve as attack vectors. Organizations utilizing this plugin face risks including data breaches, unauthorized access to user accounts, and potential compromise of entire web applications through the exploitation of this stored XSS vulnerability. The attack surface is particularly concerning given that the vulnerability affects all versions up to 1.0, indicating that the plugin's developers may have failed to implement proper input validation mechanisms during its development lifecycle.
Mitigation strategies for CVE-2025-52771 should prioritize immediate plugin updates to versions that address the stored XSS vulnerability through proper input sanitization and output encoding. System administrators should implement comprehensive input validation measures that filter or escape potentially malicious content before storage, adhering to established security practices outlined in the OWASP Top Ten and related security frameworks. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent execution of unauthorized scripts, while regular security audits of plugin code can help identify similar vulnerabilities. Organizations should also consider implementing web application firewalls to detect and block malicious input patterns, and establish monitoring procedures to identify potential exploitation attempts. The remediation process should include thorough testing of updated plugin versions to ensure that the XSS vulnerability has been properly addressed without introducing regressions in functionality. Given the nature of this vulnerability, it is essential that all users of the bcupham Video Expander plugin upgrade immediately to the patched version to prevent potential exploitation and maintain the security posture of their web applications.