CVE-2021-35479

Name: CVE-2021-35479
Creator: NVD / NIST
Published: 2021-07-30T14:15:17.943+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 13.15%

Last modified Jun 17, 2026

CVE-2021-35479 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Nagios Log Server before 2.1.9 contains Stored XSS in the custom column view for the alert history and audit log function through the affected pp parameter. This affects users who open a crafted link or third-party web page.. EPSS estimates a 13.15% chance of exploitation in the next 30 days.

Description

Nagios Log Server before 2.1.9 contains Stored XSS in the custom column view for the alert history and audit log function through the affected pp parameter. This affects users who open a crafted link or third-party web page.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

13.15%

95.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Nagios	Log Server	< 2.1.9

References

https://research.nccgroup.com/2021/07/22/technical-advisory-stored-and-reflected-xss-vulnerability-in-nagios-log-server-cve-2021-35478cve-2021-35479/Exploit, Third Party Advisory
https://research.nccgroup.com/?research=Technical%20advisoriesThird Party Advisory
https://www.nagios.com/downloads/nagios-log-server/change-log/Vendor Advisory
https://research.nccgroup.com/2021/07/22/technical-advisory-stored-and-reflected-xss-vulnerability-in-nagios-log-server-cve-2021-35478cve-2021-35479/Exploit, Third Party Advisory
https://research.nccgroup.com/?research=Technical%20advisoriesThird Party Advisory
https://www.nagios.com/downloads/nagios-log-server/change-log/Vendor Advisory

Timeline

Published: Jul 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-35479?

How severe is CVE-2021-35479?

CVE-2021-35479 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 13.15% probability of exploitation in the next 30 days.

How do I fix CVE-2021-35479?

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-2021-35479?

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

Scan your code now

Source: NVD / NIST