CVE-2025-58001 is a medium-severity vulnerability classified under CWE-79, indicating an Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This vulnerability affects the product 'Compact Archives' developed by Noumaan Yaqoob, specifically versions up to and including 4.1.0. The vulnerability allows an attacker to inject malicious scripts that are stored on the server and subsequently executed in the browsers of users who access the affected web pages. This type of Stored XSS can lead to unauthorized actions on behalf of the user, theft of session cookies, defacement, or redirection to malicious sites. The CVSS v3.1 score is 6.5, reflecting a medium severity with the vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, meaning the attack can be performed remotely over the network with low attack complexity, requires low privileges and user interaction, and impacts confidentiality, integrity, and availability to a limited extent with scope changed (affecting resources beyond the vulnerable component). No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability arises from insufficient input sanitization during web page generation, allowing malicious payloads to persist and execute in victim browsers.

For European organizations using Compact Archives, this vulnerability poses risks primarily related to user session hijacking, data theft, and potential defacement or manipulation of web content. Since the vulnerability requires low privileges but user interaction, phishing or social engineering could be used to trigger exploitation. The scope change indicates that the impact could extend beyond the immediate vulnerable component, potentially affecting other parts of the web application or user data. Confidentiality and integrity impacts, although limited, could lead to exposure of sensitive information or unauthorized actions performed under the victim's credentials. Availability impact is also possible but limited. Organizations handling sensitive or regulated data (e.g., GDPR-protected personal data) could face compliance issues if exploited. The absence of known exploits currently reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability is public. The medium severity suggests prioritizing remediation but not an emergency response.

1. Implement strict input validation and output encoding on all user-supplied data before rendering it in web pages, specifically targeting the affected Compact Archives component. 2. Employ Content Security Policy (CSP) headers to restrict script execution sources and reduce the impact of potential XSS payloads. 3. Monitor and audit web application logs for unusual input patterns or suspicious user activity that could indicate attempted exploitation. 4. Educate users about the risks of clicking on untrusted links or interacting with suspicious content to reduce user interaction risk. 5. Since no patch is currently linked, coordinate with the vendor Noumaan Yaqoob for timely updates or workarounds. 6. Consider implementing web application firewalls (WAF) with rules to detect and block XSS payloads targeting Compact Archives. 7. Review and restrict privileges to minimize the impact of low-privilege exploitation. 8. Conduct regular security testing, including penetration testing focused on XSS vulnerabilities, to identify and remediate similar issues proactively.