CVE-2024-25399 is a Cross Site Scripting (XSS) vulnerability identified in Subrion CMS version 4.2.1, specifically via the adminer.php script. XSS vulnerabilities arise when an application includes untrusted data in a web page without proper validation or escaping, allowing attackers to inject malicious scripts that execute in the browsers of other users. This vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. The CVSS 3.1 base score is 6.1, reflecting a medium severity level. The vector string (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N) indicates that the attack can be performed remotely over the network without privileges or authentication, requires user interaction, and impacts confidentiality and integrity with a scope change. The vulnerability allows an attacker to craft malicious input that, when processed by adminer.php, results in script execution in the context of the victim’s browser session. This can lead to theft of sensitive information such as session cookies, user credentials, or manipulation of displayed content. Although no known exploits are currently active in the wild and no official patches have been released, the presence of this vulnerability in a CMS used for website management poses a risk to administrators and users. The lack of patches means organizations must rely on temporary mitigations until an official fix is available. The vulnerability’s exploitation requires tricking an authenticated user to interact with malicious content, which could be delivered via phishing or social engineering. The scope change in the CVSS vector suggests that the vulnerability affects resources beyond the initially vulnerable component, potentially impacting the entire CMS environment.

The impact of CVE-2024-25399 on organizations worldwide includes potential compromise of administrative accounts and leakage of sensitive information through session hijacking or credential theft. Attackers exploiting this XSS vulnerability could execute arbitrary JavaScript in the context of the CMS admin interface, leading to unauthorized actions or data manipulation. While availability is not directly affected, the integrity and confidentiality of the CMS and its managed content are at risk. This can result in defacement, unauthorized content changes, or further compromise of the web infrastructure. Organizations relying on Subrion CMS for critical web services or e-commerce may face reputational damage and operational disruptions. The ease of exploitation without authentication but requiring user interaction means targeted phishing campaigns could be effective. The vulnerability also increases the attack surface for chained attacks, where XSS is used as an initial foothold for more severe exploits. Given the widespread use of CMS platforms in various sectors, including government, education, and business, the threat has broad implications for data security and trustworthiness of web services.

To mitigate CVE-2024-25399, organizations should immediately restrict access to the adminer.php script by implementing IP whitelisting or VPN-only access to the administrative interface. Employ web application firewalls (WAFs) with custom rules to detect and block malicious payloads targeting adminer.php. Administrators should enforce strict Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. Input validation and output encoding should be applied rigorously in the adminer.php code to neutralize malicious inputs; if source code access is available, developers should sanitize all user-supplied data using established libraries. Until an official patch is released, consider disabling or removing the adminer.php component if it is not essential. Conduct regular security awareness training to educate users about phishing risks and the dangers of interacting with suspicious links. Monitor logs for unusual activity related to adminer.php and implement multi-factor authentication (MFA) for all administrative accounts to reduce the risk of credential compromise. Finally, stay updated with vendor advisories for any forthcoming patches or security updates.