DOM-Based Cross-Site Scripting in Envision Page Builder

Executive Summary

CVE-2026-57780 is a Cross-Site Scripting (XSS) vulnerability in the WordPress Envision Page Builder Plugin, affecting versions up to and including 0.22.

This vulnerability occurs due to improper neutralization of input during web page generation, specifically a DOM-Based XSS issue.

It requires a privileged user, such as a Contributor or Developer, to perform an action like clicking a malicious link or submitting a form for the exploit to succeed.

If exploited, attackers can inject malicious scripts into the website, which execute when visitors access the site.

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Detection Guidance

Detecting this DOM-Based Cross-Site Scripting (XSS) vulnerability in the Envision Page Builder plugin (versions <= 0.22) on your system or network requires checking for the presence of the vulnerable plugin and monitoring for suspicious activity. Below are some methods and commands to help identify the vulnerability.

• Check if the Envision Page Builder plugin is installed and its version: WordPress plugins can be listed via the WordPress admin dashboard under 'Plugins'. Alternatively, you can use the WP-CLI command: wp plugin list --fields=name,version,status. Look for 'envision-page-builder' and verify if its version is 0.22 or lower.
• Scan for vulnerable plugin files: Use a file integrity monitoring tool or manually inspect the WordPress plugins directory for the presence of the Envision Page Builder plugin. The path is typically /wp-content/plugins/envision-page-builder/. Check the plugin's readme.txt or main PHP file for version information.
• Monitor network traffic for suspicious XSS payloads: Use network monitoring tools like Wireshark or an Intrusion Detection System (IDS) such as Snort to detect unusual HTTP requests containing XSS payloads (e.g., <script>, javascript:, or onerror=). Example Snort rule: alert tcp any any -> $HOME_NET $HTTP_PORTS (msg:"Possible XSS Attack"; flow:to_server,established; content:"<script>"; nocase; sid:1000001;).
• Use a vulnerability scanner: Tools like WPScan can scan your WordPress installation for known vulnerabilities. Run the following command: wpscan --url your-wordpress-site.com --enumerate vp. This will check for vulnerable plugins, including Envision Page Builder.
• Check web server logs for exploitation attempts: Review your web server logs (e.g., Apache or Nginx) for requests containing suspicious input, such as script tags or unusual query parameters. Example command to filter logs: grep -i "<script\|javascript:" /var/log/apache2/access.log.
• Verify user roles and permissions: Since this vulnerability requires a privileged user (e.g., Contributor or Developer) to interact with a malicious link or form, audit your WordPress user roles. Ensure no unauthorized users have elevated privileges. Use the WP-CLI command: wp user list --role=contributor,author,editor,administrator.

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Impact Analysis

Exploitation of this vulnerability can allow attackers to inject malicious scripts into your website.

• These scripts could perform unwanted actions such as redirecting visitors to malicious sites or displaying unauthorized advertisements.
• Because the vulnerability requires a privileged user to trigger it, insider threats or compromised accounts increase risk.

The overall severity is considered low with a CVSS score of 6.5, but such XSS vulnerabilities are often targeted in mass-exploit campaigns affecting many websites.

As of the report date, no official patch is available, so immediate mitigation actions like updating the plugin or consulting a web developer are recommended.

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Compliance Impact

This Cross-Site Scripting (XSS) vulnerability in the Envision Page Builder plugin can impact compliance with standards and regulations like GDPR and HIPAA due to its potential to expose sensitive data or allow unauthorized actions on a website.

• GDPR: If the XSS vulnerability is exploited to steal user data (e.g., cookies, session tokens, or personal information), it could lead to a data breach. Under GDPR, organizations must protect personal data, and failure to do so may result in non-compliance, fines, or legal action.
• HIPAA: For websites handling protected health information (PHI), an XSS attack could compromise the confidentiality or integrity of patient data. HIPAA requires strict safeguards for PHI, and this vulnerability could violate those requirements if exploited.
• General security standards: Many compliance frameworks (e.g., ISO 27001, PCI DSS) require protection against injection attacks like XSS. Failure to mitigate such vulnerabilities may result in non-compliance with these standards.

While the CVSS score of 6.5 indicates a medium severity, the actual compliance impact depends on the type of data handled by the affected website and how the vulnerability is exploited.

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Mitigation Strategies

Immediate action is recommended to mitigate this vulnerability since there is no official patch available yet.

• Update the Envision Page Builder plugin to a version higher than 0.22 once a patch is released.
• Seek assistance from your hosting provider or a web developer to implement temporary mitigations or workarounds.
• Limit privileged user actions such as clicking unknown links or submitting untrusted forms to reduce exploitation risk.

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