How severe is CVE-2019-3923?

CVE-2019-3923 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-3923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3923?

CVE-2019-3923 affects Tenable Nessus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3923?

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

When was CVE-2019-3923 published?

CVE-2019-3923 was published on 2019-02-12 and last updated on 2026-06-17.

CVE-2019-3923

CVE-2019-3923 is a medium-severity vulnerability in Tenable Nessus with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Tenable Nessus
Published: 2019-02-12
Last modified: 2026-06-17

Description

Nessus versions 8.2.1 and earlier were found to contain a stored XSS vulnerability due to improper validation of user-supplied input. An authenticated, remote attacker could potentially exploit this vulnerability via a specially crafted request to execute arbitrary script code in a user's browser session. Tenable has released Nessus 8.2.2 to address this issue.

Frequently asked questions

What is CVE-2019-3923?: Nessus versions 8.2.1 and earlier were found to contain a stored XSS vulnerability due to improper validation of user-supplied input. An authenticated, remote attacker could potentially exploit this vulnerability via a specially crafted request to execute arbitrary script code in a user's browser session. Tenable has released Nessus 8.2.2 to address this issue.
How severe is CVE-2019-3923?: CVE-2019-3923 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-3923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3923?: CVE-2019-3923 affects Tenable Nessus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3923?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-3923 published?: CVE-2019-3923 was published on 2019-02-12 and last updated on 2026-06-17.

References

https://www.tenable.com/security/tns-2019-01

Affected products (1)

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

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