Here is a sobering statistic: Over 90% of all hacked WordPress sites are compromised through a plugin vulnerability, not the WordPress core software itself.
While WordPress core is rigorously maintained by a massive security team, the 60,000+ plugins in the repository are built by third-party developers with varying levels of security expertise.
Many site owners follow the philosophy of “If it isn’t broken, don’t fix it.” They leave plugins outdated for months or years because they are afraid an update will break their site layout.
In the world of cybersecurity, this mindset is dangerous. An outdated plugin is not just “old code”—it is a known backdoor that hackers are actively scanning for.
In this guide, we will explain exactly why updates matter, how hackers exploit old versions, and the safest strategy for keeping your site current.
The “CVE” Lifecycle: How Hackers Find You
When a security researcher finds a bug in a popular plugin (like Elementor, WooCommerce, or Wordfence), they report it. The developer fixes it and releases a new version.
Once the patch is released, the vulnerability becomes public knowledge. It is assigned a CVE (Common Vulnerabilities and Exposures) ID.
Here is the timeline of an attack:
- Day 0: Vulnerability found in “Plugin X” (Version 2.0).
- Day 1: Developer releases “Plugin X” (Version 2.1) with a security fix.
- Day 2: Hackers read the “changelog” or compare the code of v2.0 vs v2.1 to see exactly what was fixed.
- Day 3: Hackers write a script to scan the internet for any site still running “Plugin X” version 2.0.
- Day 4: Your site gets hacked because you didn’t click “Update.”
The Reality: The moment an update is released, the clock starts ticking. You are in a race against the bots.
The “readme.txt” Information Leak
How do hackers know which version you are running?
WordPress plugins almost always include a file called readme.txt or changelog.txt in their folder.
yoursite.com/wp-content/plugins/contact-form-7/readme.txt
This file is publicly accessible and usually lists the “Stable tag: 5.4.2” right at the top.
FunSentry’s Role:
When you run a scan with FunSentry, we check if these readme.txt files are publicly readable. We flag this as “Version Disclosure.” While not a direct hack, it gives attackers the exact intelligence they need to target your specific outdated plugins.
The Danger of “Abandoned” Plugins
Sometimes, you are fully updated, but the plugin itself is the problem.
An Abandoned Plugin is one that hasn’t been updated by its developer in over 6 months or a year.
- It may not be compatible with the latest PHP version (e.g., PHP 8.2+).
- It may have unpatched security holes that no one is fixing.
- It might have been sold to a malicious actor.
Rule of Thumb: If a plugin hasn’t been updated in 12 months, find a replacement immediately. The WordPress repository displays a warning banner for these plugins—take it seriously.
How to Update Safely (The Staging Method)
The fear of breaking your site is valid. Updates can cause conflicts. Here is the professional workflow to update without anxiety.
1. The “Cowboy” Method (High Risk)
Clicking “Update Now” on your live site without a backup.
- Pros: Fast.
- Cons: If it breaks, your site is down, and you are scrambling to fix it.
2. The Professional Method (Zero Risk)
Most modern hosts (Kinsta, WP Engine, SiteGround, Cloudways) offer a Staging Environment.
- Clone to Staging: Click one button to create a copy of your site.
- Update on Staging: Run all plugin updates on the copy.
- Test: Check your homepage, contact forms, and checkout process.
- Push to Live: If everything works, push the changes back to the live site.
Auto-Updates: Friend or Foe?
WordPress 5.5 introduced native auto-updates for plugins. Should you turn them on?
| Plugin Type | Recommendation | Why? |
| Security Plugins | ✅ Auto-Update | You need firewall rules immediately. |
| Minor Plugins | ✅ Auto-Update | “Limit Login Attempts” or “SMTP” plugins rarely break sites. |
| Page Builders | ❌ Manual | Elementor/Divi updates often change CSS/Layout. Test first. |
| WooCommerce | ❌ Manual | Never auto-update your checkout flow. Always test. |
Summary: Your Update Strategy
| Best Practice | Description |
| Check Weekly | Log in once a week to apply updates. Don’t let them pile up. |
| Read Changelogs | Look for words like “Security Fix,” “Patched XSS,” or “Critical.” Prioritize these. |
| Backup First | Always have a restore point before clicking update. |
| Remove Unused | If a plugin is deactivated, delete it. Hackers can exploit files in deactivated plugins too! |
| Hide Versions | Block access to readme.txt and changelog.txt via .htaccess. |
Are your plugins leaking data?
Hackers are scanning your site right now to see if you are running old versions. Run a free scan at FunSentry to see if your plugin readme.txt files are exposing your version numbers to the world.