CVE-2025-53270: WordPress CTA Plugin CSRF Vulnerability

CVE-2025-53270 Overview

CVE-2025-53270 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the Blend Media WordPress CTA plugin (easy-sticky-sidebar). The flaw impacts all plugin versions up to and including 1.7.0. An attacker can trick an authenticated WordPress user into submitting a forged request that performs unintended state-changing actions on the plugin.

The issue was published to the NVD on 2025-06-27 and last updated on 2026-06-17. It carries a CVSS 3.1 base score of 4.3 (Medium) and requires user interaction. No public exploit or CISA KEV listing exists at the time of publication.

Critical Impact
An attacker can coerce an authenticated WordPress user into performing unintended plugin actions by visiting a crafted page, resulting in limited integrity impact on affected sites.

Affected Products

Blend Media WordPress CTA plugin (easy-sticky-sidebar)
All versions from n/a through <= 1.7.0
WordPress installations with the plugin activated

Discovery Timeline

2025-06-27 - CVE-2025-53270 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-53270

Vulnerability Analysis

The plugin exposes state-changing actions without verifying the origin or authenticity of the request. WordPress provides a nonce mechanism (wp_nonce_field, check_admin_referer, and wp_verify_nonce) to protect against CSRF, but the affected plugin endpoints do not enforce these checks.

An attacker hosts a malicious page containing an auto-submitting form or an image tag targeting the plugin action. When an authenticated administrator or privileged user visits the page, the browser attaches the WordPress session cookie and submits the request. The server processes the action as if the legitimate user initiated it.

The CVSS vector indicates network attack reach with low complexity, no privileges required from the attacker, and required user interaction. Impact is limited to integrity, with confidentiality and availability unaffected.

Root Cause

The root cause is missing CSRF protection on plugin request handlers. Affected actions do not validate a WordPress nonce or verify the request originator, violating the same-site request integrity guarantees that WordPress expects plugin authors to enforce.

Attack Vector

Exploitation requires an authenticated WordPress user with access to the plugin's functionality to visit an attacker-controlled page. The attacker crafts a page that issues a forged HTTP request to the vulnerable plugin endpoint. Because the browser automatically supplies authentication cookies, the request executes with the victim's privileges.

The vulnerability mechanism is documented in the Patchstack WordPress Vulnerability Report. No public proof-of-concept has been released.

Detection Methods for CVE-2025-53270

Indicators of Compromise

Unexpected changes to plugin settings within wp-admin that do not correlate with legitimate administrator activity
Web server logs showing POST requests to plugin endpoints with Referer headers pointing to external domains
Requests to plugin action URLs missing the _wpnonce query parameter or form field

Detection Strategies

Review WordPress audit logs for plugin configuration changes attributable to authenticated sessions triggered from external referrers
Alert on HTTP requests to easy-sticky-sidebar administrative endpoints that arrive with cross-origin referrers
Correlate administrator browsing history with plugin state changes to identify forged actions

Monitoring Recommendations

Enable a WordPress audit logging plugin to record configuration and option changes with source IP and referrer data
Deploy a web application firewall (WAF) rule that inspects requests to plugin admin endpoints for missing nonce parameters
Monitor outbound links in emails and web content delivered to administrators for suspicious targets that match plugin action URLs

How to Mitigate CVE-2025-53270

Immediate Actions Required

Identify all WordPress sites running the easy-sticky-sidebar plugin at version 1.7.0 or earlier
Deactivate the plugin until a patched release is installed if administrators cannot avoid untrusted browsing sessions
Restrict wp-admin access to trusted IP ranges via server or WAF rules to reduce CSRF exposure

Patch Information

At the time of publication, no fixed version was listed in the NVD entry. Site operators should monitor the Patchstack advisory and the plugin's WordPress.org listing for a release above 1.7.0 that adds nonce validation to affected handlers.

Workarounds

Require administrators to use a dedicated browser or profile for WordPress administration to limit cross-site cookie exposure
Enforce SameSite cookie attributes on WordPress authentication cookies using server configuration
Apply a WAF virtual patch that rejects requests to plugin endpoints lacking a valid _wpnonce value

bash

# Example NGINX rule to block POSTs to the plugin without a nonce parameter
location ~* /wp-admin/admin(-ajax|-post)\.php$ {
    if ($request_method = POST) {
        if ($args !~* "_wpnonce=") {
            return 403;
        }
    }
}