How severe is CVE-2018-17193?

CVE-2018-17193 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-2018-17193 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-17193?

CVE-2018-17193 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-17193?

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

When was CVE-2018-17193 published?

CVE-2018-17193 was published on 2018-12-19 and last updated on 2026-06-17.

CVE-2018-17193

CVE-2018-17193 is a medium-severity vulnerability in Apache Nifi 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: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Apache Nifi
Published: 2018-12-19
Last modified: 2026-06-17

Description

The message-page.jsp error page used the value of the HTTP request header X-ProxyContextPath without sanitization, resulting in a reflected XSS attack. Mitigation: The fix to correctly parse and sanitize the request attribute value was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Frequently asked questions

What is CVE-2018-17193?: The message-page.jsp error page used the value of the HTTP request header X-ProxyContextPath without sanitization, resulting in a reflected XSS attack. Mitigation: The fix to correctly parse and sanitize the request attribute value was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.
How severe is CVE-2018-17193?: CVE-2018-17193 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-2018-17193 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-17193?: CVE-2018-17193 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-17193?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-17193 published?: CVE-2018-17193 was published on 2018-12-19 and last updated on 2026-06-17.

References

https://nifi.apache.org/security.html#CVE-2018-17193

Affected products (1)

cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*

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