CVE-2025-58623: Event Feed for Eventbrite XSS Vulnerability

CVE-2025-58623 Overview

CVE-2025-58623 is a DOM-Based Cross-Site Scripting (XSS) vulnerability in the Bohemia Plugins Event Feed for Eventbrite plugin for WordPress. The flaw stems from improper neutralization of input during web page generation [CWE-79]. It affects all versions of the plugin up to and including 1.3.2. An authenticated attacker with low privileges can inject malicious JavaScript that executes in a victim's browser after user interaction. The scope change indicates that successful exploitation can affect resources beyond the vulnerable component.

Critical Impact
Attackers can execute arbitrary JavaScript in the context of a victim's browser session, enabling session theft, credential harvesting, and unauthorized actions on behalf of the user.

Affected Products

Bohemia Plugins Event Feed for Eventbrite (WordPress plugin)
Plugin slug: event-feed-for-eventbrite
All versions from n/a through 1.3.2

Discovery Timeline

2025-09-03 - CVE-2025-58623 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-58623

Vulnerability Analysis

The Event Feed for Eventbrite plugin fails to properly sanitize input before it is rendered into the Document Object Model (DOM). This is a client-side XSS variant where the payload is processed and reflected by JavaScript executing within the browser rather than by server-side code. An attacker with a low-privilege authenticated account can inject a crafted payload that the plugin's client-side logic writes into the DOM without sufficient encoding. Because the vulnerability results in a scope change, script execution can affect data or components outside the plugin's own security boundary.

Root Cause

The root cause is missing or inadequate output encoding when the plugin renders user-controllable input into the page through client-side JavaScript. Values that should be treated as inert data are instead interpreted as HTML or script by the browser. This category of flaw is tracked as [CWE-79], Improper Neutralization of Input During Web Page Generation.

Attack Vector

Exploitation requires an authenticated user with at least low-level privileges and a separate victim interaction, such as clicking a crafted link or visiting a page rendered by the plugin. The attack is delivered over the network. Once triggered, the injected script executes with the privileges of the victim's browser session, allowing the attacker to steal cookies, perform actions as the victim, or pivot to other application resources.

No verified public exploit code is available. Technical details are documented in the Patchstack XSS Vulnerability Report.

Detection Methods for CVE-2025-58623

Indicators of Compromise

Unexpected <script> tags, event handler attributes, or javascript: URIs appearing in Eventbrite feed content rendered by the plugin.
Outbound browser requests from WordPress site visitors to unfamiliar domains coinciding with plugin page loads.
Administrator or editor session cookies observed in third-party logs or referrer headers.

Detection Strategies

Review WordPress access logs for requests to plugin endpoints containing HTML entities, angle brackets, or encoded script fragments in query strings.
Enable Content Security Policy (CSP) reporting to capture inline script violations originating from pages that embed the Eventbrite feed.
Audit plugin-generated pages with a headless browser to identify DOM sinks that write attacker-controlled values without encoding.

Monitoring Recommendations

Monitor for creation of new administrator accounts or role escalation events following visits to pages containing the plugin's shortcodes.
Alert on anomalous XHR or fetch calls to external hosts issued from authenticated WordPress admin sessions.
Track plugin version inventory across managed WordPress sites to identify installations still running 1.3.2 or earlier.

How to Mitigate CVE-2025-58623

Immediate Actions Required

Identify all WordPress sites with the event-feed-for-eventbrite plugin installed and confirm the installed version.
Update the plugin to a version later than 1.3.2 once the vendor releases a patched release.
Rotate credentials and session tokens for any accounts that may have interacted with attacker-supplied plugin content.

Patch Information

At the time of NVD publication, the vulnerability affects the plugin up to and including version 1.3.2. Administrators should consult the Patchstack advisory and the vendor's plugin page for the latest fixed release and upgrade guidance.

Workarounds

Deactivate and remove the Event Feed for Eventbrite plugin until a fixed version is available.
Restrict WordPress accounts able to publish or edit pages containing the plugin's shortcodes to trusted administrators only.
Deploy a Web Application Firewall (WAF) rule to block requests containing common XSS payload patterns targeting plugin endpoints.
Enforce a strict Content Security Policy that disallows inline scripts and untrusted external script sources.

bash

# Configuration example: locate and disable the affected plugin via WP-CLI
wp plugin list --name=event-feed-for-eventbrite --format=table
wp plugin deactivate event-feed-for-eventbrite
wp plugin update event-feed-for-eventbrite