How severe is CVE-2018-1147?

CVE-2018-1147 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-2018-1147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1147?

CVE-2018-1147 affects Tenable Nessus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1147?

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

When was CVE-2018-1147 published?

CVE-2018-1147 was published on 2018-05-18 and last updated on 2026-06-17.

CVE-2018-1147

CVE-2018-1147 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% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Tenable Nessus
Published: 2018-05-18
Last modified: 2026-06-17

Description

In Nessus before 7.1.0, a XSS vulnerability exists due to improper input validation. A remote authenticated attacker could create and upload a .nessus file, which may be viewed by an administrator allowing for the execution of arbitrary script code in a user's browser session. In other scenarios, XSS could also occur by altering variables from the Advanced Settings.

Frequently asked questions

What is CVE-2018-1147?: In Nessus before 7.1.0, a XSS vulnerability exists due to improper input validation. A remote authenticated attacker could create and upload a .nessus file, which may be viewed by an administrator allowing for the execution of arbitrary script code in a user's browser session. In other scenarios, XSS could also occur by altering variables from the Advanced Settings.
How severe is CVE-2018-1147?: CVE-2018-1147 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-2018-1147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1147?: CVE-2018-1147 affects Tenable Nessus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1147 published?: CVE-2018-1147 was published on 2018-05-18 and last updated on 2026-06-17.

References

Affected products (1)

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

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