How severe is CVE-2018-18940?

CVE-2018-18940 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-2018-18940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18940?

CVE-2018-18940 affects Netscape Enterprise Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18940?

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

When was CVE-2018-18940 published?

CVE-2018-18940 was published on 2019-01-31 and last updated on 2026-06-17.

CVE-2018-18940

CVE-2018-18940 is a medium-severity vulnerability in Netscape Enterprise Server 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% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Netscape Enterprise Server
Published: 2019-01-31
Last modified: 2026-06-17

Description

servlet/SnoopServlet (a servlet installed by default) in Netscape Enterprise 3.63 has reflected XSS via an arbitrary parameter=[XSS] in the query string. A remote unauthenticated attacker could potentially exploit this vulnerability to supply malicious HTML or JavaScript code to a vulnerable web application, which is then reflected back to the victim and executed by the web browser. NOTE: this product is discontinued.

Frequently asked questions

What is CVE-2018-18940?: servlet/SnoopServlet (a servlet installed by default) in Netscape Enterprise 3.63 has reflected XSS via an arbitrary parameter=[XSS] in the query string. A remote unauthenticated attacker could potentially exploit this vulnerability to supply malicious HTML or JavaScript code to a vulnerable web application, which is then reflected back to the victim and executed by the web browser. NOTE: this product is discontinued.
How severe is CVE-2018-18940?: CVE-2018-18940 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-2018-18940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18940?: CVE-2018-18940 affects Netscape Enterprise Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18940 published?: CVE-2018-18940 was published on 2019-01-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:netscape:enterprise_server:3.63:*:*:*:*:*:*:*

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