What is CVE-2019-15898?

CVE-2019-15898 is a medium-severity vulnerability in Nagios Log Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-09-03.

How severe is CVE-2019-15898?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Nagios Log Server

CVE-2019-15898

Nagios Log Server before 2.0.8 allows Reflected XSS via the username on the Login page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.016 (74.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Nagios Log Server

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/lucaottoni/reflectedxss_nagios/blob/master/README.md (Exploit, Third Party Advisory)
www.nagios.com/downloads/nagios-log-server/change-log/ (Vendor Advisory)

Frequently asked questions

What is CVE-2019-15898?: CVE-2019-15898 is a medium-severity vulnerability in Nagios Log Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-09-03.
How severe is CVE-2019-15898?: Medium severity. CVSS v3 base score is 6.1 out of 10.