How severe is CVE-2019-3961?

CVE-2019-3961 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-3961 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3961?

CVE-2019-3961 affects Tenable Nessus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3961?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-3961 published?

CVE-2019-3961 was published on 2019-06-25 and last updated on 2026-06-17.

CVE-2019-3961

CVE-2019-3961 is a medium-severity vulnerability in Tenable Nessus with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Tenable Nessus
Published: 2019-06-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2019-3961?: CVE-2019-3961 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-3961 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3961?: CVE-2019-3961 affects Tenable Nessus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3961?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-3961 published?: CVE-2019-3961 was published on 2019-06-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*

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