CVE-2025-26586

Vulnerability

Overview The Events Planner plugin for WordPress is vulnerable to reflected cross-site scripting (XSS) in versions up to and including 1.3.10. The issue arises from improper neutralization of user input during web page generation, allowing attackers to inject arbitrary HTML and JavaScript code [1].

Exploitation

Conditions Exploitation requires an authenticated user with elevated privileges (e.g., administrator) to click a crafted link or visit a maliciously prepared page. The attacker does not need direct access to the target site but must trick a privileged user into performing the action [1]. This type of vulnerability is commonly used in mass-exploit campaigns against multiple websites.

Impact

Successful exploitation enables the attacker to inject malicious scripts, such as redirects, advertisements, or other HTML payloads, which execute when other users visit the affected site. This can lead to data theft, session hijacking, or defacement [1].

Mitigation

The vendor has not yet released an official patch, but Patchstack has provided a mitigation rule to block attacks until an update is available. Users are advised to update the plugin as soon as a patched version is released or apply the provided mitigation [1].