CVE-2025-62948 identifies a stored Cross-site Scripting (XSS) vulnerability in the Date counter software developed by Konstantin Pankratov, specifically affecting versions up to and including 2.0.3. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows malicious scripts to be stored persistently on the server and subsequently executed in the browsers of users who access the affected pages. This type of vulnerability is particularly dangerous because it can lead to session hijacking, credential theft, unauthorized actions on behalf of users, and defacement of web content. The CVSS v3.1 score of 6.5 reflects a medium severity, with an attack vector of network (remote exploitation), low attack complexity, requiring privileges (PR:L) and user interaction (UI:R), and a scope change (S:C) indicating that the vulnerability affects resources beyond the initially vulnerable component. The impact includes partial loss of confidentiality, integrity, and availability. No public exploits have been reported yet, but the vulnerability’s presence in a web-facing application makes it a potential target for attackers. The lack of available patches at the time of publication necessitates immediate attention to mitigate risks through alternative controls. The vulnerability affects web applications that use the Date counter product, which may be integrated into various organizational websites or services.

For European organizations, the exploitation of this stored XSS vulnerability could lead to significant security incidents including unauthorized access to user sessions, theft of sensitive information, and manipulation of web content. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR breaches due to data exposure), and disrupt business operations. Since the vulnerability requires low privileges but user interaction, phishing or social engineering campaigns could be used to facilitate exploitation. Organizations relying on the Date counter product for web-based date tracking or display services may face targeted attacks aiming to compromise user trust or gain footholds for further network intrusion. The medium severity indicates a moderate but tangible risk, especially for sectors with high web presence such as e-commerce, government portals, and online services. The scope change suggests that the vulnerability could affect multiple components or users beyond the initially compromised element, increasing potential damage.

1. Monitor for and apply official patches or updates from Konstantin Pankratov as soon as they become available to remediate the vulnerability directly. 2. Implement strict input validation on all user-supplied data to ensure that potentially malicious scripts are sanitized before processing or storage. 3. Employ robust output encoding techniques when rendering data in web pages to prevent script execution. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Conduct regular security audits and penetration testing focusing on web application input handling and stored content. 6. Educate users and administrators about the risks of phishing and social engineering that could facilitate exploitation requiring user interaction. 7. Use web application firewalls (WAFs) configured to detect and block XSS payloads targeting the Date counter application. 8. Isolate the Date counter application environment to limit the scope of potential compromise and prevent lateral movement within networks.