CVE-2025-62089: Mergado Pack CSRF Vulnerability

CVE-2025-62089 Overview

CVE-2025-62089 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the MERGADO Mergado Pack (mergado-marketing-pack) WordPress plugin. The flaw impacts all versions up to and including 4.2.1. An attacker can trick an authenticated user into submitting a forged request that performs unintended state-changing actions in the plugin. Exploitation requires user interaction, such as visiting an attacker-controlled page while authenticated to the target WordPress site. The vulnerability is classified under [CWE-352] and affects integrity without directly compromising confidentiality or availability.

Critical Impact
Attackers can perform unauthorized actions on behalf of authenticated WordPress users when they visit a malicious page, potentially altering plugin configuration or triggering marketing pack functions.

Affected Products

MERGADO Mergado Pack WordPress plugin (mergado-marketing-pack) versions up to and including 4.2.1
WordPress sites with the vulnerable plugin installed and activated
Authenticated WordPress users targeted through social engineering

Discovery Timeline

2025-12-31 - CVE-2025-62089 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-62089

Vulnerability Analysis

The Mergado Pack plugin exposes one or more state-changing endpoints that do not validate anti-CSRF tokens or verify request origin. WordPress provides nonces via wp_nonce_field() and check_admin_referer() to defend against this class of attack, but the affected handlers in Mergado Pack fail to enforce these checks. An attacker crafts an HTML page containing a form or JavaScript that automatically submits a request to the vulnerable plugin endpoint. When an authenticated administrator or user visits the attacker's page, the browser attaches valid session cookies and the server processes the request as legitimate.

The impact is limited to integrity changes according to the CVSS vector. No credential theft or code execution is directly enabled by the flaw. However, depending on which plugin actions are reachable, an attacker could modify plugin settings, alter marketing feed configuration, or trigger data-processing routines without the user's consent.

Root Cause

The root cause is missing or improper CSRF token validation on privileged plugin actions. The plugin trusts authenticated session state without verifying that the request originated from a legitimate plugin interface, which violates the CWE-352 secure design principle.

Attack Vector

Exploitation is network-based and requires user interaction. An attacker hosts a malicious page containing an auto-submitting form or fetch request targeting the vulnerable endpoint. When a logged-in WordPress user visits the page, the browser submits authenticated requests to the target site. The Mergado Pack handler processes them without validating a nonce, executing the attacker-supplied action.

The vulnerability is described in the Patchstack WordPress Vulnerability database. No public proof-of-concept exploit is currently listed.

Detection Methods for CVE-2025-62089

Indicators of Compromise

Unexpected changes to Mergado Pack plugin configuration or feed settings recorded in WordPress audit logs
HTTP POST or GET requests to Mergado plugin admin endpoints containing Referer headers pointing to third-party domains
Administrator sessions triggering plugin state changes shortly after browsing external links or emails

Detection Strategies

Monitor WordPress wp-admin request logs for state-changing calls to Mergado Pack endpoints that lack a valid _wpnonce parameter
Correlate browser referrer anomalies with plugin configuration modifications in WordPress activity logs
Enable a Web Application Firewall (WAF) rule set that inspects requests to mergado-marketing-pack handlers for missing CSRF tokens

Monitoring Recommendations

Deploy WordPress activity logging plugins to capture plugin setting changes with user, IP, and referrer context
Review web server access logs weekly for administrative POST requests originating from off-site referrers
Alert on any Mergado Pack administrative action performed within minutes of external referrer traffic to wp-admin

How to Mitigate CVE-2025-62089

Immediate Actions Required

Update Mergado Pack to a version later than 4.2.1 once the vendor publishes a patched release
Restrict WordPress administrator accounts to dedicated browsers or browser profiles used only for site management
Enforce short session lifetimes and require re-authentication for sensitive administrative actions

Patch Information

At the time of publication, the Patchstack advisory tracks the vulnerability against versions up to and including 4.2.1. Administrators should monitor the MERGADO plugin changelog and apply any subsequent security release. Until a fix is available, apply mitigating controls or disable the plugin.

Workarounds

Deactivate the Mergado Pack plugin until a patched version is available if it is not required for business operations
Deploy a WordPress-aware WAF rule that blocks state-changing requests to Mergado Pack endpoints missing a valid nonce
Configure SameSite=Lax or SameSite=Strict cookies for WordPress session cookies to reduce cross-site request delivery
Require administrators to log out of WordPress sessions when browsing untrusted content

bash

# Example: enforce SameSite cookies in nginx for WordPress admin sessions
proxy_cookie_path / "/; SameSite=Strict; Secure; HttpOnly";