CVE-2025-49964: ClipLink Plugin CSRF Vulnerability

CVE-2025-49964 Overview

CVE-2025-49964 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the indgeek ClipLink WordPress plugin. The flaw impacts all versions of ClipLink up to and including 1.1. An attacker can trick an authenticated user into submitting a forged state-changing request against the plugin, resulting in limited integrity impact on the target site.

The issue is tracked as CWE-352: Cross-Site Request Forgery and requires user interaction to succeed. No confidentiality or availability impact has been reported. The EPSS probability score is 0.128%, reflecting a low estimated likelihood of exploitation in the near term.

Critical Impact
Successful exploitation lets an attacker perform unauthorized state-changing actions in ClipLink through a victim's authenticated browser session.

Affected Products

indgeek ClipLink plugin for WordPress, versions up to and including 1.1
WordPress sites with the ClipLink plugin installed and active
Any deployment running ClipLink 1.1 or earlier without a corresponding patch

Discovery Timeline

2025-06-20 - CVE-2025-49964 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-49964

Vulnerability Analysis

CVE-2025-49964 is a Cross-Site Request Forgery weakness classified under CWE-352. The ClipLink plugin fails to validate the origin or authenticity of state-changing HTTP requests submitted to plugin endpoints. As a result, a request originating from an attacker-controlled page can be executed with the privileges of an authenticated victim.

Exploitation requires user interaction, such as visiting a crafted webpage or clicking a malicious link while logged into the target WordPress site. The attack is delivered over the network without any prior authentication on the attacker's side. Impact is limited to integrity — the attacker can alter data or trigger actions the victim is permitted to perform, but cannot directly read confidential data or degrade availability.

Root Cause

The root cause is missing or inadequate CSRF protection on plugin request handlers. WordPress provides wp_nonce_field() and check_admin_referer() to bind requests to a user session, but ClipLink versions through 1.1 do not consistently enforce nonce validation on affected endpoints. Without a verified anti-CSRF token, the server cannot distinguish a legitimate action initiated by the user from one forged by a remote attacker.

Attack Vector

An attacker hosts a malicious page containing an auto-submitting HTML form or image tag that targets a vulnerable ClipLink endpoint. When an authenticated ClipLink user visits that page, the browser automatically sends the request along with the user's session cookies. The vulnerable endpoint processes the request as if the user initiated it, executing the attacker's chosen action.

Further technical detail is available in the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-49964

Indicators of Compromise

Unexpected configuration or content changes in ClipLink made outside normal administrative workflows
HTTP POST requests to ClipLink endpoints with Referer or Origin headers pointing to third-party domains
WordPress admin actions correlated with users visiting external URLs immediately prior
Absence of a valid _wpnonce parameter on state-changing ClipLink requests

Detection Strategies

Review WordPress audit logs for ClipLink modifications lacking corresponding admin UI navigation events
Inspect web server access logs for cross-origin Referer headers on plugin POST endpoints
Deploy a web application firewall rule that flags requests to ClipLink handlers missing a nonce parameter

Monitoring Recommendations

Enable a WordPress activity logging plugin to capture user actions and source IP addresses
Alert on ClipLink configuration changes performed from unusual browsers, IP addresses, or geolocations
Monitor outbound HTTP referrers from admin sessions to identify potential CSRF delivery pages

How to Mitigate CVE-2025-49964

Immediate Actions Required

Deactivate the ClipLink plugin on any WordPress site running version 1.1 or earlier until a fixed release is applied
Require administrators to log out of WordPress when not actively managing the site to shrink the CSRF attack window
Restrict access to /wp-admin by IP address where operationally feasible

Patch Information

At the time of publication, no fixed version is listed in the referenced advisory. Consult the Patchstack Vulnerability Report for updates from the vendor indgeek and apply the patched release as soon as it becomes available.

Workarounds

Uninstall ClipLink and replace it with an actively maintained alternative if a patch is not forthcoming
Deploy a web application firewall with CSRF protection rules that block cross-origin state-changing requests to plugin endpoints
Configure browsers used by administrators to enforce SameSite=Lax or stricter cookie policies for WordPress session cookies
Educate administrators to avoid clicking untrusted links while authenticated to WordPress

bash

# Example: block cross-origin POSTs to ClipLink endpoints via nginx
location ~ ^/wp-content/plugins/cliplink/ {
    if ($request_method = POST) {
        set $csrf_block "1";
    }
    if ($http_referer ~* ^https?://your-site\.example/) {
        set $csrf_block "0";
    }
    if ($csrf_block = "1") {
        return 403;
    }
}