Is CVE-2017-2295 in the CISA KEV catalog?

No. CVE-2017-2295 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-2295?

CVE-2017-2295 has a CVSS v3 base score of 8.2 (HIGH).

What is the EPSS score for CVE-2017-2295?

CVE-2017-2295 has an EPSS score of 2.38% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-2295?

Upgrade puppet on debian 11 to 4.8.2-5 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2017-2295

HIGHEPSS 82th pctl

8.2

CVSS v3

NVD

Description

Versions of Puppet prior to 4.10.1 will deserialize data off the wire (from the agent to the server, in this case) with a attacker-specified format. This could be used to force YAML deserialization in an unsafe manner, which would lead to remote code execution. This change constrains the format of data on the wire to PSON or safely decoded YAML.

CWE-502Deserialization of Untrusted Data

How to fix

Remediation Available

puppetDebian

Fixed in:4.8.2-5CVE-2017-2295

puppetUbuntu

Fixed in:3.4.3-1ubuntu1.2USN-3308-1

Fixed in:3.8.5-2ubuntu0.1+esm1USN-4804-1

puppet-commonUbuntu

Fixed in:3.4.3-1ubuntu1.2USN-3308-1

Fixed in:3.8.5-2ubuntu0.1+esm1USN-4804-1

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 RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

2.38%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Vendor Advisory1

puppet.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-0669	High	7.2	100%	KEV + Ransom	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-35464	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-29300	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-53770	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-47986	Critical	9.8	100%	KEV + Ransom	-

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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.