How severe is CVE-2018-18517?

CVE-2018-18517 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-18517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18517?

CVE-2018-18517 affects Citrix Netscaler Gateway Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18517?

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

When was CVE-2018-18517 published?

CVE-2018-18517 was published on 2018-10-24 and last updated on 2026-06-17.

CVE-2018-18517

CVE-2018-18517 is a medium-severity vulnerability in Citrix Netscaler Gateway Firmware with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Citrix Netscaler Gateway Firmware
Published: 2018-10-24
Last modified: 2026-06-17

Description

Citrix NetScaler Gateway 10.5.x before 10.5.69.003, 11.1.x before 11.1.59.004, 12.0.x before 12.0.58.7, and 12.1.x before 12.1.49.1 has XSS.

Frequently asked questions

What is CVE-2018-18517?: Citrix NetScaler Gateway 10.5.x before 10.5.69.003, 11.1.x before 11.1.59.004, 12.0.x before 12.0.58.7, and 12.1.x before 12.1.49.1 has XSS.
How severe is CVE-2018-18517?: CVE-2018-18517 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-18517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18517?: CVE-2018-18517 affects Citrix Netscaler Gateway Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18517?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18517 published?: CVE-2018-18517 was published on 2018-10-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:citrix:netscaler_gateway_firmware:*:*:*:*:*:*:*:*

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