CVE-2025-58211 in Chatbox Manager Plugin
Summary
by MITRE • 08/27/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in alexvtn Chatbox Manager allows Stored XSS. This issue affects Chatbox Manager: from n/a through 1.2.6.
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Analysis
by VulDB Data Team • 08/30/2025
This vulnerability represents a critical cross-site scripting flaw in the alexvtn Chatbox Manager plugin that enables stored XSS attacks. The weakness occurs during web page generation when user input is improperly sanitized or escaped before being rendered back to users. The vulnerability affects all versions from the initial release through version 1.2.6, indicating a long-standing issue that has persisted across multiple iterations of the plugin. The stored nature of this XSS vulnerability means that malicious payloads injected by attackers can persist in the application's database and automatically execute whenever other users view the affected content, making it particularly dangerous for chat and messaging systems where user-generated content is prevalent.
The technical implementation of this flaw likely involves the plugin's failure to properly validate and sanitize user inputs submitted through chat messages, comments, or other interactive elements. When these inputs contain malicious script code such as javascript:alert(1) or more sophisticated payload variants, the application stores them without adequate sanitization. During subsequent page rendering, these stored scripts execute in the context of other users' browsers, potentially leading to session hijacking, credential theft, or further exploitation. This vulnerability directly maps to CWE-79 which defines improper neutralization of input during web page generation as a primary weakness category for cross-site scripting attacks. The attack vector typically involves an authenticated user with privileges to post content, though in some cases guest posting capabilities may also be exploited.
The operational impact of this vulnerability extends beyond simple script execution as it can enable comprehensive user compromise and system infiltration. Attackers can leverage stored XSS to steal session cookies, redirect users to malicious sites, inject additional malicious content, or even perform actions on behalf of users through automated browser manipulation. In the context of chat applications, this represents a significant threat to user privacy and system integrity since chat messages are often viewed by multiple users simultaneously. The vulnerability also aligns with ATT&CK technique T1566.001 which covers phishing with malicious attachments or links, as attackers can craft payloads that appear legitimate within the chat interface. Additionally, this weakness can facilitate lateral movement within compromised networks if users with elevated privileges are targeted, as session hijacking capabilities can enable further unauthorized access.
Mitigation strategies should include immediate implementation of proper input sanitization and output escaping mechanisms throughout the application's codebase, particularly in areas where user-generated content is processed and stored. The plugin should enforce strict validation of all inputs to ensure they conform to expected formats and reject any content containing potentially dangerous script tags or javascript protocols. Implementing Content Security Policy headers can provide additional defense-in-depth measures to prevent execution of unauthorized scripts even if the primary sanitization fails. Regular security audits and code reviews should focus on input validation routines, and the development team should consider implementing automated testing for XSS vulnerabilities during the development lifecycle. Users should be advised to update to the latest version of the plugin immediately upon availability, and administrators should monitor for suspicious user activity or unauthorized content that may indicate exploitation attempts. The vulnerability also underscores the importance of implementing proper access controls and user privilege management to limit the scope of potential damage from compromised accounts.