Is CVE-2017-20199 in the CISA KEV catalog?

No. CVE-2017-20199 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-20199?

CVE-2017-20199 has a CVSS v3 base score of 3.1 (LOW).

What is the EPSS score for CVE-2017-20199?

CVE-2017-20199 has an EPSS score of 0.43% (34th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-20199?

Upgrade buttercup to 1.0.1 or later.

CVE & CISA-KEV Catalog

CVE-2017-20199

LOW

3.1

CVSS v3

NVD

Description

A vulnerability was found in Buttercup buttercup-browser-extension up to 0.14.2. Affected by this vulnerability is an unknown functionality of the component Vault Handler. The manipulation results in improper access controls. The attack may be performed from a remote location. A high complexity level is associated with this attack. The exploitation appears to be difficult. The exploit has been made public and could be used. Upgrading to version 1.0.1 addresses this issue. The patch is identified as 89. Upgrading the affected component is recommended. This vulnerability only affects products that are no longer supported by the maintainer.

CWE-266 CWE-284Improper Access Control

How to fix

Remediation Available

buttercupNVD

Affected:< 1.0.1Fixed in:1.0.1CVE-2017-20199derived 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 ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Exploit Intelligence

0.43%probability of exploitation in 30 days

34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory2

Issue Tracking3

Release Notes1

github.com

VDB Entry1

vuldb.com

Related Vulnerabilities

Other CWE-266 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-28000	Critical	9.8	68%	-	Fix
CVE-2025-27007	Critical	9.8	51%	-	-
CVE-2025-47539	Critical	9.8	31%	-	Fix
CVE-2022-20759	High	8.8	28%	-	Fix
CVE-2024-13106	Medium	5.3	27%	-	-
CVE-2024-3013	Medium	6.3	23%	-	-

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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 2026-04-29.