Is CVE-2016-2171 in the CISA KEV catalog?

No. CVE-2016-2171 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-2171?

CVE-2016-2171 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-2171?

CVE-2016-2171 has an EPSS score of 42.67% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2016-2171

HIGHEPSS 99th pctl

7.5

CVSS v3

NVD

Description

The User Manager service in Apache Jetspeed before 2.3.1 does not properly restrict access using Jetspeed Security, which allows remote attackers to (1) add, (2) edit, or (3) delete users via the REST API.

CWE-264

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

42.67%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.