CVE-2021-33177

Name: CVE-2021-33177
Creator: NVD / NIST
Published: 2021-10-14T15:15:08.99+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 9.82%

Last modified Jun 17, 2026

CVE-2021-33177 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 9.82% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

9.82%

94.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nagios	Nagios Xi	< 5.8.5

References

https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xiThird Party Advisory
https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xiThird Party Advisory

Timeline

Published: Oct 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33177?

How severe is CVE-2021-33177?

CVE-2021-33177 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 9.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33177?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33177?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST