CVE-2025-39597: Fast eBay Listings Open Redirect Flaw

CVE-2025-39597 Overview

CVE-2025-39597 is an open redirect vulnerability affecting the Arthur Yarwood Fast eBay Listings WordPress plugin. The flaw exists in all plugin versions up to and including 2.12.15. Attackers can craft malicious URLs that leverage the plugin's redirect functionality to send victims to attacker-controlled sites. The issue is classified under CWE-601 (URL Redirection to Untrusted Site). Successful exploitation supports phishing campaigns by abusing the trust of the vulnerable site's domain.

Critical Impact
Attackers can weaponize the plugin's redirect handling to send users from a trusted WordPress site to phishing pages, bypassing user domain-based trust checks.

Affected Products

Arthur Yarwood Fast eBay Listings (fast-ebay-listings) WordPress plugin
All versions from n/a through <= 2.12.15
WordPress sites running the vulnerable plugin

Discovery Timeline

2025-04-16 - CVE-2025-39597 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-39597

Vulnerability Analysis

CVE-2025-39597 is an open redirect flaw in the Fast eBay Listings plugin for WordPress. The plugin accepts a user-controlled URL parameter and performs a client- or server-side redirect without validating the destination against an allowlist of trusted hosts. Attackers exploit this by sending victims a link that points to the legitimate WordPress site but includes a redirect parameter targeting an attacker-controlled domain.

The attack requires user interaction, since the victim must click the crafted link. Because the initial URL displays the trusted site's domain, users are more likely to trust the link in email, social media, or messaging platforms. Once the redirect executes, the browser lands on an attacker page that can host credential harvesting forms, malware downloads, or fake login prompts imitating the original site.

Root Cause

The root cause is missing or insufficient validation of a redirect target parameter within the plugin. The redirect handler treats attacker-supplied input as a trusted destination and issues an HTTP redirect (or JavaScript navigation) to that URL. There is no host allowlist, relative-path enforcement, or signed token check preventing external destinations.

Attack Vector

Exploitation occurs over the network and requires user interaction, but does not require authentication. An attacker distributes a link such as https://victim-site.example/?redirect=https://attacker.example/login through phishing email or social channels. When the victim clicks, the vulnerable plugin issues a redirect from the legitimate domain to the attacker's phishing page. See the Patchstack advisory for additional detail.

Detection Methods for CVE-2025-39597

Indicators of Compromise

Web server access logs containing requests to plugin endpoints with URL parameters pointing to external domains
Referrer headers on external phishing domains showing the vulnerable WordPress site as the origin
User reports of unexpected redirects from the site to unfamiliar login pages

Detection Strategies

Inspect HTTP access logs for query parameters containing fully qualified URLs (http:// or https://) directed at the fast-ebay-listings plugin
Deploy a web application firewall (WAF) rule that flags redirect parameters resolving to external hostnames
Monitor outbound HTTP Location response headers for external destinations originating from plugin routes

Monitoring Recommendations

Alert on repeated 30x responses from plugin endpoints redirecting to newly registered or low-reputation domains
Correlate spikes in redirect traffic with phishing threat intelligence feeds
Track user-reported phishing incidents referencing the WordPress site's URL as the initial click target

How to Mitigate CVE-2025-39597

Immediate Actions Required

Disable or remove the Fast eBay Listings plugin until a fixed version is confirmed available
Audit all WordPress plugins and remove those that are unmaintained or unused
Deploy a WAF rule blocking external URLs in redirect parameters targeting the plugin

Patch Information

At the time of publication, the Patchstack advisory lists all versions through 2.12.15 as affected. Site administrators should monitor the plugin's WordPress.org listing for a patched release and apply updates immediately once available.

Workarounds

Restrict plugin redirect parameters to relative paths only using web server rewrite rules
Add a WAF rule to strip or block query parameters containing absolute URLs on plugin endpoints
Educate users to verify the final URL in the address bar before entering credentials

bash

# Example nginx rule to block external redirect targets on the plugin endpoint
location ~* /wp-content/plugins/fast-ebay-listings/ {
    if ($arg_redirect ~* "^https?://") {
        return 403;
    }
}