What’s Vulnerable › Vulnerabilities

CVE-2018-8733

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 26.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-04-18 · updated 2026-06-17
• Weakness: CWE-89

Description

Authentication bypass vulnerability in the core config manager in Nagios XI 5.2.x through 5.4.x before 5.4.13 allows an unauthenticated attacker to make configuration changes and leverage an authenticated SQL injection vulnerability.

Affected products

• Nagios XI: from 5.2.0 before 5.4.13 — fixed in 5.4.13

How to fix

Upgrade to a fixed version: Nagios XI 5.4.13. Check the vendor advisory for mitigations.

References

• https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
• https://blog.redactedsec.net/exploits/2018/04/26/nagios.html
• https://gist.github.com/caleBot/f0a93b5a98574393e0139104eacc2d0f
• https://www.exploit-db.com/exploits/44560/
• https://www.exploit-db.com/exploits/44969/
• https://www.nagios.com/downloads/nagios-xi/change-log/
• https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT
• https://blog.redactedsec.net/exploits/2018/04/26/nagios.html
• https://gist.github.com/caleBot/f0a93b5a98574393e0139104eacc2d0f
• https://www.exploit-db.com/exploits/44560/
• https://www.exploit-db.com/exploits/44969/
• https://www.nagios.com/downloads/nagios-xi/change-log/

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