CVE-2024-8411 identifies a cross-site scripting vulnerability in the ABCD2 software, specifically in versions up to 2.2.0-beta-1. The vulnerability resides in the /buscar_integrada.php script, where the Sub_Expresion parameter is not properly sanitized or validated, allowing an attacker to inject malicious JavaScript code. This XSS flaw can be triggered remotely without requiring authentication, although it necessitates user interaction, such as clicking a maliciously crafted URL. The vulnerability could allow attackers to execute arbitrary scripts in the context of the victim's browser, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The developer has indicated that the script was completely redesigned after version 2.2.0-beta-1, implying that upgrading to a later version mitigates this issue. The CVSS 4.0 base score is 5.1, reflecting medium severity, with attack vector network, low attack complexity, no privileges required, but user interaction needed. No known active exploits have been reported in the wild, but public disclosure increases the risk of exploitation attempts. The vulnerability primarily affects organizations using ABCD2 in environments such as libraries or document management systems, where the software is deployed to facilitate integrated search functions.

The primary impact of this vulnerability is on the confidentiality and integrity of users interacting with the affected ABCD2 system. Successful exploitation allows attackers to execute arbitrary scripts in users' browsers, potentially leading to theft of session cookies, user credentials, or manipulation of displayed content. This can facilitate further attacks such as account takeover or phishing. While availability is not directly impacted, the trustworthiness of the affected system is compromised. Organizations relying on ABCD2 for document or library management may face reputational damage and user trust erosion if exploited. Since the vulnerability requires user interaction, the scope is somewhat limited, but the remote attack vector and lack of authentication requirement increase the risk. The public disclosure of the vulnerability may lead to increased scanning and exploitation attempts, especially in environments where ABCD2 is widely deployed and not promptly updated.

1. Upgrade ABCD2 to a version later than 2.2.0-beta-1 where the /buscar_integrada.php script has been redesigned and this vulnerability addressed. 2. If upgrading is not immediately possible, implement web application firewall (WAF) rules to detect and block malicious payloads targeting the Sub_Expresion parameter. 3. Employ strict input validation and output encoding on all user-supplied inputs, especially parameters used in dynamic content generation. 4. Educate users about the risks of clicking untrusted links to reduce the likelihood of successful user interaction exploitation. 5. Conduct regular security assessments and code reviews focusing on input sanitization in web-facing scripts. 6. Monitor logs for unusual requests to /buscar_integrada.php that may indicate exploitation attempts. 7. Consider implementing Content Security Policy (CSP) headers to restrict execution of unauthorized scripts in browsers accessing the application.