CVE-2025-27358 is a medium-severity vulnerability classified under CWE-80, which pertains to improper neutralization of script-related HTML tags in web pages, commonly known as a Cross-Site Scripting (XSS) vulnerability. This specific vulnerability affects the Frontend File Manager product developed by mndpsingh287, impacting versions up to 23.2. The vulnerability allows an attacker to inject malicious scripts into web pages viewed by other users. The CVSS 3.1 base score is 4.6, indicating a medium severity level. The vector string (AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L) reveals that the attack can be performed remotely over the network with low attack complexity, requires low privileges, and user interaction is necessary. The impact primarily affects the integrity and availability of the affected system, with no direct confidentiality loss. The vulnerability does not currently have known exploits in the wild, and no patches have been linked yet. The core technical issue is that the Frontend File Manager fails to properly sanitize or encode user-supplied input before rendering it in the web interface, allowing script tags or event handlers to execute in the context of other users' browsers. This can lead to code injection, session hijacking, or manipulation of the user interface, potentially disrupting normal operations or enabling further attacks.

For European organizations using the mndpsingh287 Frontend File Manager, this vulnerability poses a risk of targeted attacks that could compromise the integrity and availability of file management operations. While the confidentiality impact is minimal, attackers could inject scripts that alter file listings, disrupt workflows, or perform actions on behalf of authenticated users, leading to operational disruptions. In sectors such as finance, healthcare, or government, where file management tools are critical, such disruptions could have cascading effects on service delivery and compliance. Additionally, if exploited in environments with sensitive data, attackers might leverage the XSS to conduct phishing or social engineering attacks against users, increasing the risk of credential theft or further compromise. The requirement for user interaction limits mass exploitation but does not eliminate targeted spear-phishing or social engineering campaigns. Given the web-based nature of the vulnerability, organizations with remote or distributed workforces are particularly exposed.

Organizations should implement strict input validation and output encoding on all user-supplied data within the Frontend File Manager interface to prevent script injection. Until an official patch is released, administrators should consider restricting access to the Frontend File Manager to trusted networks or VPNs to reduce exposure. Employing Content Security Policy (CSP) headers can help mitigate the impact of injected scripts by restricting the execution of unauthorized scripts. Additionally, user education to recognize and avoid suspicious links or content can reduce the risk of user interaction exploitation. Monitoring web server logs and user activity for unusual patterns may help detect attempted exploitation. Finally, organizations should maintain an inventory of affected software versions and apply patches promptly once available.