CVE-2025-67630 is a stored Cross-site Scripting (XSS) vulnerability identified in the webheadcoder WH Tweaks plugin, specifically affecting versions up to and including 1.0.2. The vulnerability results from improper neutralization of input during web page generation, meaning that user-supplied data is not adequately sanitized or encoded before being embedded into web pages. This allows an attacker with at least limited privileges (PR:L) to inject malicious JavaScript code that is stored persistently within the application and executed in the context of other users' browsers when they view the affected pages. The attack requires user interaction (UI:R), such as a victim visiting a crafted page or interface, to trigger the malicious script execution. The CVSS vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates that the attack can be launched remotely over the network with low complexity, but requires the attacker to have some privileges and the victim to interact with the malicious content. The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component, potentially impacting other users or components. The impact on confidentiality and integrity is low, as the attacker can execute scripts that may steal session tokens, perform actions on behalf of users, or manipulate displayed content, but there is no direct impact on availability. No patches or exploit code are currently publicly available, and no known exploits in the wild have been reported. However, the vulnerability poses a risk to web applications using this plugin, especially those with multiple users or administrative interfaces.

For European organizations, this vulnerability could lead to unauthorized access to user sessions, theft of sensitive information, and potential privilege escalation within web applications using the WH Tweaks plugin. Given the stored nature of the XSS, malicious scripts can affect multiple users, increasing the risk of widespread compromise within an organization’s web environment. This could result in data breaches, reputational damage, and compliance violations under regulations such as GDPR. The impact is particularly significant for organizations relying on WordPress-based infrastructures where WH Tweaks is deployed, including e-commerce, government portals, and service providers. Although availability is not affected, the compromise of confidentiality and integrity can facilitate further attacks, such as phishing or malware distribution. The requirement for limited privileges and user interaction somewhat reduces the risk but does not eliminate it, especially in environments with many users or where privilege separation is weak.

1. Monitor for and apply security patches or updates from webheadcoder as soon as they become available to address CVE-2025-67630. 2. Restrict access to the WH Tweaks plugin to trusted users only, minimizing the number of accounts with privileges to input data that could be exploited. 3. Implement strict Content Security Policies (CSP) to limit the execution of unauthorized scripts and reduce the impact of XSS attacks. 4. Employ web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting the plugin. 5. Conduct regular code reviews and input validation enhancements to ensure all user inputs are properly sanitized and encoded before rendering. 6. Educate users and administrators about the risks of clicking on untrusted links or interacting with suspicious content. 7. Consider disabling or replacing the WH Tweaks plugin if it is not essential or if timely patches are unavailable. 8. Use security headers such as X-XSS-Protection and HTTPOnly cookies to mitigate exploitation vectors. 9. Perform regular security audits and penetration testing focusing on web application vulnerabilities including stored XSS.