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Home / Blog / wordpress 3.9.27
Security Advisory

WordPress 3.9.27 Security Vulnerability: CVE-2025-2839 Guide

📅 June 07, 2026 ·⏱ 5 min read ·🔒 SiteRecipe Security Team
181 websites still running wordpress 3.9.27  → View full list
1
Total
1
Medium

WordPress 3.9.27 has been flagged with a medium-severity security vulnerability that could put your website at risk. CVE-2025-2839 affects the popular WP Import Export Lite plugin, leaving 181 websites potentially exposed to attack. This vulnerability allows attackers to inject malicious scripts through insufficient input sanitization, compromising your site's security and visitor data.

Understanding this vulnerability is crucial for website owners who rely on the Import Export functionality. The good news is that the fix is straightforward, and we'll walk you through everything you need to know. By following our comprehensive guide, you can secure your WordPress installation and protect your business from potential threats.

What is Wordpress 3.9.27?

WordPress 3.9.27 is a stable release version of WordPress, the world's most popular website building platform. It powers millions of websites across the globe and includes core features for content management, user administration, and plugin functionality. This particular version has been in use by many website owners who appreciate its stability and compatibility with a wide range of plugins and themes.

The WP Import Export Lite plugin is a commonly used WordPress extension that allows website administrators to easily import and export content, including posts, pages, and user data. This functionality is invaluable for website migrations, backups, and content management. However, like all software, it requires regular updates to maintain security and patch vulnerabilities that may be discovered over time.

Key Vulnerabilities in Wordpress 3.9.27

1 CVEs found. The most critical are explained below.

MEDIUM CVE-2025-2839 6.4/10 · CVSS v3.1 ⏱ Within 7 days
WP Import Export Lite Plugin Security Flaw

A security weakness was found in the WP Import Export Lite plugin (version 3.9.27 and earlier) that allows attackers to inject harmful code into your website. Contributors or higher-level users can exploit this to inject malicious scripts that affect other users visiting your site.

Impact: An attacker could steal visitor information, redirect users to malicious sites, deface your website, or compromise user accounts. This could damage your reputation and expose sensitive data.

↗ View on NVD

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How to Check If Your Website Is Affected

How to Fix These Vulnerabilities

Conclusion

Protecting your WordPress website from security vulnerabilities is essential for maintaining the trust of your visitors and safeguarding your business data. CVE-2025-2839 is a manageable threat when addressed promptly, and updating your WP Import Export Lite plugin takes just minutes. Don't let security gaps compromise your hard work—take action today and ensure your WordPress installation is fully protected.

Make security monitoring and vulnerability management effortless with SiteRecipe.com. Our platform automatically scans your WordPress sites for known vulnerabilities, provides real-time alerts, and offers step-by-step remediation guides tailored to your specific setup. Join hundreds of website owners who trust SiteRecipe.com to keep their WordPress installations secure. Visit SiteRecipe.com today and get your first security audit free!

Frequently Asked Questions

What exactly is CVE-2025-2839 and how does it affect my website?
CVE-2025-2839 is a Stored Cross-Site Scripting (XSS) vulnerability in the WP Import Export Lite plugin version 3.9.27 and earlier. Attackers can inject malicious scripts through the 'wpiePreviewData' function due to insufficient input sanitization, potentially allowing them to steal user data, hijack accounts, or spread malware to your website visitors.
Do I need to update immediately, or is this vulnerability low-risk?
While classified as medium severity, XSS vulnerabilities should be treated seriously. We recommend updating within 24-48 hours to prevent exploitation. The longer your site remains vulnerable, the higher the risk of compromise. The fix is simple and carries no compatibility issues with most WordPress installations.
Will updating the plugin affect my imported data or existing content?
No, updating the WP Import Export Lite plugin will not affect your previously imported content or existing website data. Updates preserve all functionality and data while patching security holes. However, always maintain a backup of your WordPress database before performing any updates as a best practice.

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DISCLAIMER: This report is based on publicly available CVE data from the National Vulnerability Database (NVD) maintained by NIST. Detection of a technology version does not confirm active exploitation on any specific website. For informational purposes only. SiteRecipe is not responsible for actions taken based on this report. Always consult a qualified security professional.

Source: nvd.nist.gov · Published: June 07, 2026 · SiteRecipe.com