A high-severity Stored Cross-Site Scripting (XSS) vulnerability, exploitable via Cross-Site Request Forgery (CSRF), has been found in the Ultimate twitter profile widget WordPress plugin, which could lead to a compromise of the website.

The plugin is susceptible to a chained attack. An unauthenticated attacker can leverage a Cross-Site Request Forgery (CSRF) vulnerability to trick a logged-in administrator into unknowingly submitting a request. This request contains a malicious script that is then permanently stored (Stored XSS) on the website.

This vulnerability is rated 7.1 (High) on the CVSS scale. Once the malicious script is stored, it will execute in the browser of any visitor or administrator viewing the affected content. This can be used to hijack administrative sessions, deface the website, steal user data, or redirect traffic to phishing or malware sites, causing significant operational and reputational harm.

Immediate Action: Update the Ultimate twitter profile widget plugin to the latest patched version immediately. If no update is available, the plugin should be disabled and uninstalled to mitigate the risk.

Proactive Monitoring: Inspect website content, particularly widget areas, for any injected malicious scripts. Review administrative audit logs for any unauthorized configuration changes.

Compensating Controls: Implement a Web Application Firewall (WAF) configured to block XSS and CSRF attack patterns. Ensure administrators follow security best practices, such as not browsing other sites while logged into the WordPress dashboard.

Public Exploit Available: false

The ability to inject persistent malicious scripts into a website is a critical threat. Administrators of sites using this plugin must act urgently to apply the vendor's patch or remove the plugin. Failure to do so leaves the website and its users vulnerable to attack.