CVE-2025-2479 identifies a reflected Cross-Site Scripting (XSS) vulnerability in the Easy Custom Admin Bar plugin for WordPress, developed by duogeek. This vulnerability exists due to improper neutralization of input during web page generation, specifically through the 'msg' parameter, which lacks sufficient input sanitization and output escaping. As a result, attackers can craft malicious URLs containing JavaScript payloads that, when clicked by a user, execute in the context of the victim's browser. This type of reflected XSS does not require authentication, making it accessible to remote attackers over the network. The vulnerability affects all versions up to and including 1.0 of the plugin. The CVSS 3.1 base score of 6.1 reflects a medium severity, with the attack vector being network-based, no privileges required, but user interaction necessary. The scope is changed (S:C), indicating that the vulnerability can affect components beyond the vulnerable plugin, potentially impacting the broader WordPress site. The impact includes limited confidentiality and integrity loss, such as session hijacking, defacement, or redirection to malicious sites, but no direct availability impact. No patches or official fixes are currently linked, and no known exploits have been reported in the wild as of the publication date. The vulnerability is categorized under CWE-79, a common and well-understood web application security issue.

The primary impact of CVE-2025-2479 is the potential compromise of user confidentiality and integrity through session hijacking, theft of sensitive information, or unauthorized actions performed on behalf of the victim. Attackers can exploit this vulnerability to inject malicious scripts that run in the context of the affected WordPress site, potentially leading to credential theft, unauthorized access, or distribution of malware. Although the vulnerability does not directly affect availability, the reputational damage and user trust erosion can be significant. Organizations running WordPress sites with the Easy Custom Admin Bar plugin are at risk, especially if they have users with elevated privileges or handle sensitive data. The requirement for user interaction (clicking a malicious link) somewhat limits the attack surface but does not eliminate risk, particularly in environments where phishing or social engineering attacks are common. The vulnerability's network accessibility and lack of required privileges increase its attractiveness to attackers. Given WordPress's widespread use globally, the impact can be broad, affecting small businesses, enterprises, and government websites alike.

1. Immediate mitigation involves updating the Easy Custom Admin Bar plugin to a patched version once available from the vendor. Since no patch links are currently provided, monitor official duogeek channels for updates. 2. In the interim, implement Web Application Firewall (WAF) rules to detect and block suspicious requests containing malicious payloads in the 'msg' parameter. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on the website. 4. Sanitize and validate all user inputs rigorously at the application level, especially parameters reflected in responses. 5. Educate users and administrators about the risks of clicking untrusted links to reduce successful phishing attempts. 6. Consider disabling or removing the Easy Custom Admin Bar plugin if it is not essential to reduce the attack surface. 7. Regularly audit and monitor web server logs for unusual activity indicative of exploitation attempts. 8. Use security plugins that provide XSS protection and scanning capabilities for WordPress environments. 9. Ensure that all other WordPress components and plugins are kept up to date to minimize compound vulnerabilities.