How to Fix cPanel 500 Internal Server Error
A 500 Internal Server Error in cPanel is one of the most common issues faced by hosting administrators. This error indicates that the server encountered an unexpected condition. Here are the most effective ways to diagnose and fix it.
Common Causes
- Corrupted
.htaccessfile - Incorrect file or directory permissions
- PHP memory limit exceeded
- Faulty PHP scripts or plugins
- Missing or broken PHP handlers
- mod_security rules blocking legitimate requests
Fix 1: Rebuild Apache Configuration
Run the following command via SSH as root:
/scripts/rebuildhttpdconf systemctl restart httpd
Fix 2: Check and Fix .htaccess
A corrupted .htaccess file is the most frequent cause:
# Rename the .htaccess file temporarily mv /home/username/public_html/.htaccess /home/username/public_html/.htaccess.bak # Test if the site loads — if it does, the .htaccess was the problem # Create a fresh default .htaccess file
Fix 3: Fix File Permissions
Incorrect permissions often cause 500 errors. Reset them to cPanel defaults:
# Directories should be 755
find /home/username/public_html/ -type d -exec chmod 755 {} \;
# Files should be 644
find /home/username/public_html/ -type f -exec chmod 644 {} \;
Fix 4: Increase PHP Memory Limit
If the error is caused by insufficient memory:
# Add to php.ini or .htaccess memory_limit = 256M max_execution_time = 300
Fix 5: Check the Error Logs
Always check the Apache error log for the specific cause:
# Global error log tail -50 /var/log/apache2/error_log # Per-user error log tail -50 /home/username/logs/error.log
Fix 6: Rebuild PHP Handlers
/scripts/rebuildhttpdconf /scripts/restartsrv_httpd
When to Contact Support
If none of these fixes resolve the issue, the problem may be server-level. Contact our support team with:
- The exact URL producing the error
- The time the error first appeared
- Any recent changes made to the account
