CVE-2021-25299 — AI Deep Analysis Summary

🚨 **Essence**: Stored XSS in Nagios XI. 📉 **Consequences**: Attackers inject malicious scripts into the web interface.…

🛡️ **Root Cause**: Improper input sanitization. 🐛 **Flaw**: The application fails to validate/escape user-controlled input in the `sshterm.php` file. 🚫 No proper filtering allows raw HTML/JS to be stored and executed.…

🏢 **Vendor**: Nagios Corporation. 📦 **Product**: Nagios XI (Infrastructure Monitoring). 📅 **Affected Version**: Specifically **Nagios XI 5.7.5**. ⚠️ Check your version immediately!…

🕵️ **Actions**: Steal admin session cookies. 🎮 **Privileges**: Gain **one-click remote command execution** on the Nagios XI server. 📊 **Data**: Full control over the monitoring infrastructure.…

🔑 **Auth Required**: Yes. 🖱️ **Trigger**: A malicious URL must be clicked by an **admin user**. 📉 **Threshold**: Medium. Requires social engineering or prior access to trick an admin.…

🔓 **Exploit Available**: Yes. 📜 **PoC**: Publicly available via Nuclei templates and PacketStorm. 🌐 **Wild Exploitation**: Active research exists (fs0c-sh repo). 🛠️ Tools: Nuclei templates can detect and exploit this.…

🔍 **Self-Check**: Scan for `/usr/local/nagiosxi/html/admin/sshterm.php`. 📡 **Tooling**: Use Nuclei with the specific CVE-2021-25299 template. 📋 **Manual**: Check if version is 5.7.5.…

🩹 **Fix**: Upgrade to a patched version. 📥 **Source**: Check Nagios official downloads page. 🔄 **Mitigation**: Apply vendor patches immediately. 📅 **Published**: Feb 15, 2021. ⏳ Time is ticking! 🛡️ Patch now!

🚧 **Workaround**: Restrict access to `sshterm.php`. 🚫 **Access Control**: Limit admin interface to trusted IPs only. 🛡️ **WAF**: Deploy Web Application Firewall rules to block XSS payloads.…

🔥 **Urgency**: HIGH. 🚨 **Priority**: Critical. 📉 **Risk**: Remote Code Execution possible. ⚡ **Action**: Patch immediately. 🏃‍♂️ **Deadline**: ASAP. 🛑 Do not ignore! 🚨 Fix it now!