What’s Vulnerable › Vulnerabilities

CVE-2021-33177

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-14 · updated 2026-06-17
• Weakness: CWE-89

Description

The Bulk Modifications functionality in Nagios XI versions prior to 5.8.5 is vulnerable to SQL injection. Exploitation requires the malicious actor to be authenticated to the vulnerable system, but once authenticated they would be able to execute arbitrary sql queries.

Affected products

• Nagios XI: before 5.8.5 — fixed in 5.8.5

How to fix

Upgrade to a fixed version: Nagios XI 5.8.5. Check the vendor advisory for mitigations.

References

• https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xi
• https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xi

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