Is CVE-2017-5656 in the CISA KEV catalog?

No. CVE-2017-5656 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-5656?

CVE-2017-5656 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2017-5656?

CVE-2017-5656 has an EPSS score of 6.83% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-5656?

Upgrade cxf to 3.1.11 or later.

CVE & CISA-KEV Catalog

CVE-2017-5656

HIGHEPSS 93th pctl

7.5

CVSS v3

NVD

Description

Apache CXF's STSClient before 3.1.11 and 3.0.13 uses a flawed way of caching tokens that are associated with delegation tokens, which means that an attacker could craft a token which would return an identifer corresponding to a cached token for another user.

CWE-384

How to fix

Remediation Available

cxfNVD

Affected:>= 3.1.0, < 3.1.11Fixed in:3.1.11CVE-2017-5656derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

6.83%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch1

cxf.apache.org

Third-Party Advisory2

Issue Tracking2

Other references6

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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 2026-05-13.