CVE-2025-60135 is a stored Cross-site Scripting (XSS) vulnerability found in the WeShare Buttons plugin developed by NIKITAS GEORGOPOULOS, affecting all versions up to and including 13.0.0. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows an attacker to inject malicious scripts that are stored and later executed in the context of users visiting the affected web pages. This type of vulnerability can be exploited when an attacker with high privileges (PR:H) submits crafted input that is not properly sanitized, and a victim user interacts with the malicious content (UI:R). The CVSS vector indicates that the attack can be performed remotely over the network (AV:N) with low attack complexity (AC:L), but requires both privileges and user interaction. The scope is changed (S:C), meaning the vulnerability can affect components beyond the initially vulnerable component. The impact includes limited confidentiality, integrity, and availability loss (C:L/I:L/A:L). Although no known exploits are currently reported in the wild, the vulnerability poses a risk to websites using this plugin, especially those with multiple users or administrative roles. The lack of available patches at the time of publication necessitates immediate mitigation efforts by administrators. Stored XSS vulnerabilities can lead to session hijacking, defacement, or redirection to malicious sites, making them significant threats to web applications.

For European organizations, the exploitation of CVE-2025-60135 could lead to unauthorized script execution within the context of affected web applications, potentially compromising user sessions, stealing sensitive data, or altering website content. This can damage organizational reputation, lead to data breaches involving personal or financial information, and disrupt service availability. Given the stored nature of the XSS, the vulnerability can affect multiple users over time, increasing the risk of widespread impact. Organizations relying on WeShare Buttons for social sharing or email functionalities on their websites may face increased risk, especially if the plugin is used in environments with multiple user roles or where user-generated content is common. The requirement for high privileges to inject malicious input limits the attack surface but does not eliminate risk, particularly in cases of insider threats or compromised administrative accounts. The vulnerability could also be leveraged as part of a larger attack chain targeting European enterprises, especially those in sectors with high web presence such as e-commerce, media, and public services.

1. Immediately audit all installations of the WeShare Buttons plugin and identify versions up to 13.0.0 in use. 2. Apply official patches or updates from the vendor as soon as they become available; if no patch exists, consider disabling or removing the plugin temporarily. 3. Implement strict input validation and output encoding on all user inputs processed by the plugin to prevent injection of malicious scripts. 4. Restrict administrative access to the plugin to trusted personnel only and enforce strong authentication mechanisms to reduce the risk of privilege abuse. 5. Monitor web application logs and user activity for signs of unusual input or script execution attempts. 6. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts on affected web pages. 7. Educate administrators and users about the risks of XSS and safe handling of web content. 8. Consider deploying web application firewalls (WAF) with rules designed to detect and block XSS payloads targeting this plugin. 9. Regularly review and update security policies related to third-party plugins and extensions.