⚠️ Security Notice: Sentora has known historical vulnerabilities that were patched in recent versions. Current stable version 2.0.2 (May 2024) addresses critical issues including RCE, privilege escalation, and authentication bypass. The project is actively maintained by the original ZPanel team.
Important: If running older versions, upgrade immediately to v2.0.2 or implement comprehensive isolation and hardening measures.
Current Status:
| Vulnerability | Type | Severity | Status |
|---|---|---|---|
| Authenticated RCE via cron module | Remote Code Execution | Critical | ✅ Patched in v2.0.2 |
| zsudo privilege escalation | Privilege Escalation | Critical | ✅ Patched in v2.0.2 |
| Password reset bypass | Authentication Bypass | Critical | ⚠️ Manual fix required |
| Multiple XSS vulnerabilities | Cross-Site Scripting | High | ✅ Patched in v2.0.2 |
Note: Verify your installation is running v2.0.2 or later. Check version in /etc/sentora/version.txt or panel dashboard.
Vulnerable File: /etc/sentora/panel/modules/cron/code/controller.ext.php
Vulnerable Parameter: inTiming
Impact: Any authenticated user can execute arbitrary system commands with web server privileges (www-data).
Exploit Pattern:
POST /?module=cron&action=CreateCron HTTP/1.1
[...]
inTiming=COMMAND_TO_EXECUTE&inUserID=1&csfr_token=TOKEN
Chained with zsudo vulnerability: Allows escalation to root privileges.
Vulnerable File: sentora/inc/init.inc.php (line 99)
Status: ⚠️ Manual fix required - This vulnerability requires a manual code change.
Impact: Attackers can reset any user’s password without email access.
How it works:
'') after successful reset instead of NULLIS NOT NULL which passes for empty stringsFix: Edit /etc/sentora/panel/inc/init.inc.php line 99:
// Change from:
UPDATE x_accounts SET ac_resethash_tx = '', ac_pass_vc = :password, ...
// To:
UPDATE x_accounts SET ac_resethash_tx = NULL, ac_pass_vc = :password, ...
Exploit Pattern (for awareness):
Email: victim@example.com
Reset Token: (empty string)
New Password: attacker_password
Vulnerable File: /etc/sentora/panel/bin/zsudo
Impact: Any user with command execution can obtain root privileges.
Exploit Pattern:
/etc/sentora/panel/bin/zsudo 'id>/tmp/$(/tmp/s.sh)'
Never expose Sentora directly to the internet. Use network isolation:
Option 1: Firewall restrictions (iptables)
# Allow only from management network
sudo iptables -A INPUT -p tcp --dport 80 -s 10.0.0.0/24 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/24 -j ACCEPT # Sentora panel
sudo iptables -A INPUT -p tcp --dport 8080 -j DROP
sudo iptables-save > /etc/iptables/rules.v4
Option 2: Firewall restrictions (firewalld)
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="10.0.0.0/24" port port="8080" protocol="tcp" accept'
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" port port="8080" protocol="tcp" reject'
sudo firewall-cmd --reload
Option 3: Firewall restrictions (UFW)
sudo ufw allow from 10.0.0.0/24 to any port 8080
sudo ufw deny 8080
sudo ufw enable
Front Sentora with Nginx + Basic Auth:
server {
listen 443 ssl;
server_name sentora.example.com;
ssl_certificate /etc/letsencrypt/live/sentora.example.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/sentora.example.com/privkey.pem;
ssl_protocols TLSv1.2 TLSv1.3;
# Basic authentication (extra layer)
auth_basic "Sentora Admin Access";
auth_basic_user_file /etc/nginx/.sentora_htpasswd;
# Rate limiting
limit_req_zone $binary_remote_addr zone=sentora:10m rate=5r/s;
limit_req zone=sentora burst=10 nodelay;
# Security headers
add_header X-Frame-Options "DENY" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Content-Security-Policy "default-src 'self'" always;
location / {
proxy_pass http://localhost:8080;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For ""; # Strip to prevent injection
proxy_set_header X-Forwarded-Proto $scheme;
}
}
Create htpasswd file:
sudo apt install apache2-utils # Debian/Ubuntu
sudo htpasswd -c /etc/nginx/.sentora_htpasswd admin
Sentora session configuration (/etc/sentora/panel/inc/init.inc.php or similar):
<?php
// Session timeout (30 minutes)
ini_set('session.gc_maxlifetime', 1800);
ini_set('session.cookie_lifetime', 1800);
// Secure cookies
ini_set('session.cookie_secure', 1);
ini_set('session.cookie_httponly', 1);
ini_set('session.use_only_cookies', 1);
// CSRF protection
ini_set('session.use_strict_mode', 1);
?>
Fix password reset vulnerability:
// Edit /etc/sentora/panel/inc/init.inc.php
// Line 99 - Change from:
UPDATE x_accounts SET ac_resethash_tx = '', ac_pass_vc = :password, ...
// To:
UPDATE x_accounts SET ac_resethash_tx = NULL, ac_pass_vc = :password, ...
Secure default admin account:
# Change admin password via MySQL
mysql -u root -p sentora
UPDATE x_accounts SET ac_pass_vc = PASSWORD('YourNewStrongPassword123!') WHERE ac_email_vc = 'admin@sentora.com';
FLUSH PRIVILEGES;
Best practices:
Delete unused accounts:
mysql -u root -p sentora
# Soft delete (disable)
UPDATE x_accounts SET ac_deleted_ts = NOW() WHERE ac_email_vc = 'olduser@domain.com';
# Or permanently delete (use with caution)
DELETE FROM x_accounts WHERE ac_email_vc = 'olduser@domain.com';
Generate SSL certificate:
# Let's Encrypt
sudo apt install certbot
sudo certbot certonly --standalone -d sentora.example.com
# Link to Sentora
sudo cp /etc/letsencrypt/live/sentora.example.com/fullchain.pem /etc/sentora/panel/ssl/sentora.crt
sudo cp /etc/letsencrypt/live/sentora.example.com/privkey.pem /etc/sentora/panel/ssl/sentora.key
sudo chmod 600 /etc/sentora/panel/ssl/sentora.key
Configure Apache for HTTPS:
<VirtualHost *:443>
ServerName sentora.example.com
DocumentRoot /etc/sentora/panel
SSLEngine on
SSLCertificateFile /etc/sentora/panel/ssl/sentora.crt
SSLCertificateKeyFile /etc/sentora/panel/ssl/sentora.key
# Security headers
Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains"
Header always set X-Content-Type-Options "nosniff"
Header always set X-Frame-Options "DENY"
Header always set X-XSS-Protection "1; mode=block"
Header always set Referrer-Policy "strict-origin-when-cross-origin"
<Directory /etc/sentora/panel>
Options -Indexes +FollowSymLinks
AllowOverride All
Require all granted
</Directory>
</VirtualHost>
# Redirect HTTP to HTTPS
<VirtualHost *:80>
ServerName sentora.example.com
Redirect permanent / https://sentora.example.com/
</VirtualHost>
Isolate Sentora server in restricted network:
# Block all outbound except essential
sudo iptables -A OUTPUT -o lo -j ACCEPT
sudo iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
sudo iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT # DNS
sudo iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT # HTTP (updates)
sudo iptables -A OUTPUT -p tcp --dport 443 -j ACCEPT # HTTPS (updates)
sudo iptables -A OUTPUT -j DROP
Deploy ModSecurity with custom rules to block known Sentora exploits:
# Install ModSecurity
sudo apt install libapache2-mod-security2 # Debian/Ubuntu
sudo a2enmod security2
sudo systemctl restart apache2
Custom Sentora protection rules (/etc/modsecurity/rules/sentora.conf):
# Block RCE in cron module inTiming parameter
SecRule ARGS:inTiming "@rx (\||;|`|\$\(|\n|\r)" \
"id:2001,\
phase:2,\
block,\
capture,\
t:none,t:urlDecodeUni,\
msg:'Sentora Cron RCE Attempt',\
log"
# Block zsudo exploitation attempts
SecRule REQUEST_URI "@rx (?i)(zsudo).*" \
"id:2002,\
phase:1,\
block,\
capture,\
t:none,\
msg:'Direct zsudo Access Attempt',\
log"
# Block password reset bypass
SecRule ARGS:resetkey "@rx ^$" \
"id:2003,\
phase:2,\
block,\
capture,\
t:none,\
msg:'Sentora Password Reset Bypass Attempt',\
log"
# Block XSS patterns
SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" \
"id:2004,\
phase:2,\
block,\
capture,\
t:none,t:urlDecodeUni,t:htmlEntityDecode,\
msg:'Sentora XSS Attempt',\
log"
Secure Sentora installation:
# Sentora typically installs to /etc/sentora
sudo chown -R root:root /etc/sentora
sudo chmod -R 750 /etc/sentora
# Config files should be more restrictive
sudo chmod 600 /etc/sentora/panel/inc/init.inc.php
sudo chmod 600 /etc/sentora/panel/ssl/*.key
# Web root
sudo chown -R www-data:www-data /etc/sentora/panel
sudo chmod -R 755 /etc/sentora/panel
# Protect zsudo binary
sudo chmod 4750 /etc/sentora/panel/bin/zsudo
sudo chown root:www-data /etc/sentora/panel/bin/zsudo
# Prevent execution in upload directories
find /etc/sentora/panel/uploads -type f -exec chmod 644 {} \;
find /etc/sentora/panel/uploads -type d -exec chmod 755 {} \;
Disable PHP execution in sensitive directories:
# /etc/apache2/conf-available/sentora-hardening.conf
<Directory "/etc/sentora/panel/uploads">
php_flag engine off
RemoveHandler .php .php3 .php4 .php5 .phtml
<FilesMatch "\.(php|php3|php4|php5|phtml)$">
Deny from all
</FilesMatch>
</Directory>
<Directory "/etc/sentora/panel/modules/cron">
# Restrict cron module access to admins only
<IfModule mod_authz_core.c>
Require ip 10.0.0.0/24
</IfModule>
</Directory>
Sentora uses MySQL/MariaDB. Secure it:
# Run secure installation
sudo mysql_secure_installation
# Key settings:
# - Set root password
# - Remove anonymous users
# - Disallow root login remotely
# - Remove test database
Configure /etc/mysql/mariadb.conf.d/50-server.cnf:
[mysqld]
# Network security - bind to localhost only
bind-address = 127.0.0.1
skip-networking = 1
# Disable local infile
local-infile = 0
# Secure file handling
secure_file_priv = /var/lib/mysql-files
# Logging
log_error = /var/log/mysql/error.log
slow_query_log = 1
slow_query_log_file = /var/log/mysql/slow.log
long_query_time = 2
# Sentora-specific: restrict database user privileges
Create restricted Sentora database user:
-- Login to MySQL
mysql -u root -p
-- Create dedicated user with minimal privileges
CREATE USER 'sentora'@'localhost' IDENTIFIED BY 'strong-password-here';
GRANT SELECT, INSERT, UPDATE, DELETE ON sentora.* TO 'sentora'@'localhost';
FLUSH PRIVILEGES;
-- Do NOT grant: FILE, PROCESS, SUPER, RELOAD, SHUTDOWN
Edit /etc/php/*/apache2/php.ini:
[Security]
expose_php = Off
allow_url_fopen = Off
allow_url_include = Off
disable_functions = exec,passthru,shell_exec,system,proc_open,popen,curl_exec,curl_multi_exec,parse_ini_file,show_source,passthru,leak,fopen,readfile
display_errors = Off
log_errors = On
error_reporting = E_ALL
html_errors = Off
[Resource Limits]
max_execution_time = 30
max_input_time = 60
memory_limit = 128M
post_max_size = 20M
upload_max_filesize = 20M
max_file_uploads = 5
[Session]
session.cookie_httponly = 1
session.cookie_secure = 1
session.use_only_cookies = 1
session.cookie_samesite = Strict
session.use_strict_mode = 1
session.gc_maxlifetime = 1800
[Open Basedir]
open_basedir = /etc/sentora:/tmp:/var/tmp
Restart Apache:
sudo systemctl restart apache2
Sentora installs many services. Disable what you don’t need:
# Check running services
systemctl list-units --type=service --state=running
# Disable unnecessary services (examples)
sudo systemctl stop named # DNS if not used
sudo systemctl disable named
sudo systemctl stop postfix # Mail if not used
sudo systemctl disable postfix
sudo systemctl stop dovecot # IMAP if not used
sudo systemctl disable dovecot
sudo systemctl stop proftpd # FTP if not used
sudo systemctl disable proftpd
Current Version Information:
# Check current version
cat /etc/sentora/version.txt
# Check for updates via official channels
# Sentora website: https://sentora.org/
# Sentora forums: https://forums.sentora.org/
# GitHub releases: https://github.com/sentora/sentora-core/releases
# Manual update process
cd /etc/sentora
sudo wget https://github.com/sentora/sentora-core/archive/refs/tags/v2.0.2.zip
sudo unzip -o v2.0.2.zip
sudo chown -R root:root /etc/sentora
# Restart services after update
sudo systemctl restart apache2 mysql named proftpd
Important: Always backup before updating:
# Backup database
mysqldump -u root -p sentora > /backup/sentora-db-$(date +%Y%m%d).sql
# Backup files
tar -czf /backup/sentora-files-$(date +%Y%m%d).tar.gz /etc/sentora
Sentora log locations:
| Log File | Purpose |
|---|---|
/etc/sentora/panel/logs/ |
Panel operation logs |
/etc/sentora/panel/logs/access.log |
Panel access |
/etc/sentora/panel/logs/error.log |
Panel errors |
/var/log/apache2/sentora* |
Web server logs |
/var/log/mysql/error.log |
Database errors |
/var/log/syslog |
System messages |
View recent activity:
# Sentora logs
tail -f /etc/sentora/panel/logs/*.log
# Filter for login events
grep -i "login\|auth" /etc/sentora/panel/logs/*.log
# Apache access logs
tail -f /var/log/apache2/sentora_access.log
# Failed requests
grep "403\|401\|500" /var/log/apache2/sentora_access.log | tail -50
Set up alerts for:
Configure log monitoring:
# /etc/logwatch/conf/logfiles/sentora.conf
LogFile = /etc/sentora/panel/logs/*.log
LogFile = /var/log/apache2/sentora*
Install AIDE or OSSEC to detect file changes:
# Install AIDE
sudo apt install aide # Debian/Ubuntu
sudo dnf install aide # RHEL/Fedora
# Initialize database
sudo aideinit
# Configure Sentora paths in /etc/aide/aide.conf
/etc/sentora/ p+i+n+u+g+s+m+c+acl+selinux+xattrs+sha512
/etc/sentora/panel/bin/zsudo p+u+g+s+m+sha512
/var/www/sentora/ p+i+n+u+g+s+m+c+acl+selinux+xattrs+sha512
# Schedule daily checks
0 5 * * * /usr/bin/aide --check
Deploy fail2ban for Sentora:
sudo apt install fail2ban
# /etc/fail2ban/jail.local
[sentora]
enabled = true
port = http,https,8080
filter = sentora
logpath = /etc/sentora/panel/logs/*.log
maxretry = 3
bantime = 3600
findtime = 300
Create filter (/etc/fail2ban/filter.d/sentora.conf):
[Definition]
failregex = ^.*Failed login.*<HOST>.*$
^.*Authentication failed.*<HOST>.*$
^.*Invalid.*<HOST>.*$
^.*Password reset.*<HOST>.*$
ignoreregex =
| Control | Status | Notes |
|---|---|---|
| Panel isolated from internet | ☐ | Behind reverse proxy/firewall |
| WAF rules deployed | ☐ | ModSecurity with Sentora rules |
| Password reset vulnerability fixed | ☐ | Patch init.inc.php |
| zsudo binary secured | ☐ | Restricted permissions |
| Cron module restricted | ☐ | Admin access only |
| Database user restricted | ☐ | Minimal privileges only |
| PHP hardening applied | ☐ | Disable dangerous functions |
| File permissions secured | ☐ | Config files 600, directories 750 |
| Unnecessary services disabled | ☐ | DNS, mail, FTP if not used |
| File integrity monitoring | ☐ | AIDE or OSSEC |
| Centralized logging | ☐ | Forward to SIEM |
| Migration plan documented | ☐ | To maintained alternative |
If you suspect a security breach:
Isolate the server immediately
# Block all external access
sudo iptables -F
sudo iptables -P INPUT DROP
sudo iptables -P OUTPUT DROP
sudo iptables -A INPUT -i lo -j ACCEPT
sudo iptables -A OUTPUT -o lo -j ACCEPT
Preserve evidence
cp -r /etc/sentora/panel/logs /root/sentora-logs-$(date +%Y%m%d-%H%M%S)
cp -r /var/log/apache2 /root/apache-logs-$(date +%Y%m%d-%H%M%S)
mysqldump -u root -p sentora > /root/sentora-db-$(date +%Y%m%d-%H%M%S).sql
Check for unauthorized changes
# Compare with AIDE database
sudo aide --check
# Look for recently modified files
find /etc/sentora -type f -mtime -7 -ls
# Check for new users
cat /etc/passwd | grep -v nologin | grep -v false
# Check cron jobs for malicious entries
crontab -l
ls -la /etc/cron.d/
Review database for unauthorized access
SELECT * FROM mysql.user WHERE Host != 'localhost';
SELECT * FROM x_accounts WHERE ac_deleted_ts IS NOT NULL;
SHOW PROCESSLIST;
Check for privilege escalation attempts
# Check zsudo usage
grep "zsudo" /var/log/auth.log
grep "zsudo" /var/log/syslog
# Check for root-owned files in /tmp
ls -la /tmp/
Change all credentials - Admin passwords, database passwords, API keys, FTP accounts
Scan for malware
sudo apt install clamav clamav-daemon
sudo freshclam
sudo clamscan -r /etc/sentora --move=/home/quarantine
Consider full rebuild - Given Sentora’s vulnerability history, a clean migration to a modern panel is recommended
Notify affected users - If customer data was exposed
Sentora v2.0.2 is actively maintained and addresses historical vulnerabilities. However, you may consider migration for:
Recommended alternatives:
| Panel | License | Active Development | Notes |
|---|---|---|---|
| HestiaCP | GPL v3 | ✅ Yes | VestaCP fork, actively maintained |
| CyberPanel | GPL v3 | ✅ Yes | OpenLiteSpeed, WordPress-focused |
| DirectAdmin | Commercial | ✅ Yes | Mature, commercial support |
| Plesk | Commercial | ✅ Yes | Enterprise features |
| CloudPanel | Proprietary | ✅ Yes | Modern, performance-focused |
Migration planning: