CVE-2024-30200 in BEAR Plugin
Summary
by MITRE • 03/28/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in realmag777 BEAR allows Reflected XSS.This issue affects BEAR: from n/a through 1.1.4.2.
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Analysis
by VulDB Data Team • 04/12/2025
The vulnerability identified as CVE-2024-30200 represents a critical cross-site scripting flaw in the realmag777 BEAR application, specifically impacting versions ranging from an unspecified initial version through 1.1.4.2. This weakness falls under the category of improper input neutralization during web page generation, creating an avenue for malicious actors to inject and execute arbitrary scripts within the context of affected users' browsers. The vulnerability manifests as a reflected cross-site scripting issue, meaning that malicious input is immediately reflected back to users without proper sanitization or encoding mechanisms.
The technical implementation of this vulnerability stems from the application's failure to adequately sanitize user-supplied input before incorporating it into dynamically generated web content. When users interact with the BEAR application and provide input that is subsequently reflected in page responses, the application does not properly encode or escape special characters that could be interpreted as executable script code. This creates a persistent security gap where attackers can craft malicious payloads that, when executed, can perform unauthorized actions on behalf of authenticated users. The vulnerability is particularly dangerous because it allows for immediate execution of malicious scripts without requiring any persistent storage or complex attack vectors.
Operationally, this reflected XSS vulnerability presents significant risks to both the application and its users. Attackers can exploit this weakness to steal session cookies, perform unauthorized actions within the application's context, redirect users to malicious websites, or even deface web pages. The impact extends beyond simple data theft, as authenticated users may be subjected to privilege escalation attacks or session hijacking attempts. The reflected nature of the vulnerability means that exploitation requires user interaction with a specially crafted URL containing malicious script payloads, but once triggered, the consequences can be severe and immediate.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and output encoding mechanisms throughout the application's codebase. The primary defense involves ensuring that all user-supplied input is properly escaped or encoded before being incorporated into web page content, particularly in response headers and dynamic HTML generation. Implementing Content Security Policy headers can provide additional protection layers against script execution, while proper input validation should be enforced at both client and server levels. Organizations should also consider implementing web application firewalls to detect and block suspicious input patterns, and regular security testing should be conducted to identify similar vulnerabilities within the application's codebase. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and maps to ATT&CK technique T1566.001 for initial access through spearphishing attachments, as attackers may leverage this vulnerability to deliver malicious payloads to unsuspecting users.
The remediation process requires comprehensive code review to identify all entry points where user input is processed and reflected in web responses. Developers should implement proper HTML escaping functions for all dynamic content generation, utilize secure coding practices that prevent direct insertion of user data into scripts or HTML attributes, and ensure that all input validation occurs before any processing begins. Additionally, regular security training for development teams can help prevent similar issues in future releases, while maintaining up-to-date dependency management to avoid introducing known vulnerabilities from third-party libraries. Organizations should prioritize immediate patching of affected versions and implement monitoring systems to detect potential exploitation attempts against this vulnerability.