What is CVE-2019-3961?

CVE-2019-3961 is a medium-severity vulnerability in Tenable Nessus, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-06-25.

How severe is CVE-2019-3961?

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

XSS in Tenable Nessus

CVE-2019-3961

Nessus versions 8.4.0 and earlier were found to contain a reflected XSS vulnerability due to improper validation of user-supplied input. An unauthenticated, remote attacker could potentially exploit this vulnerability via a specially crafted request to execute arbitrary script code in a users browser session.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-06-25 · 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: 0.015 (72.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Tenable Nessus
Tenable Nessus — versions All versions prior to 8.5.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.tenable.com/security/tns-2019-04 (Third Party Advisory)
www.securityfocus.com/bid/108892 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2019-3961?: CVE-2019-3961 is a medium-severity vulnerability in Tenable Nessus, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-06-25.
How severe is CVE-2019-3961?: Medium severity. CVSS v3 base score is 6.1 out of 10.