No exploitation reportedFix available

CVE-2018-6513

Q: Is CVE-2018-6513 actively exploited?

Active exploitation of CVE-2018-6513 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-6513?

CVE-2018-6513 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2018-06-11
Fixed in5.5.2 · 5.3.7 · 1.10.13
WeaknessCWE-426

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Puppet Enterprise 2016.4.x prior to 2016.4.12, Puppet Enterprise 2017.3.x prior to 2017.3.7, Puppet Enterprise 2018.1.x prior to 2018.1.1, Puppet Agent 1.10.x prior to 1.10.13, Puppet Agent 5.3.x prior to 5.3.7, and Puppet Agent 5.5.x prior to 5.5.2, were vulnerable to an attack where an unprivileged user on Windows agents could write custom facts that can escalate privileges on the next puppet run. This was possible through the loading of shared libraries from untrusted paths.

Timeline

dates in UTC

2018-06-1120:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-6513?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-6513?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Puppet

Branch	Affected	Fixed in	Source
5.5	≥ 5.5.0, < 5.5.2	5.5.2	NVD
5.3	≥ 5.3.0, < 5.3.7	5.3.7	NVD
1.10	≥ 1.10.0, < 1.10.13	1.10.13	NVD

Puppet puppet enterprise

Branch	Affected	Fixed in	Source
2018.1	≥ 2018.1.0, < 2018.1.1	2018.1.1	NVD
2017.3	≥ 2017.3.0, < 2017.3.7	2017.3.7	NVD
2016.4	≥ 2016.4.0, < 2016.4.12	2016.4.12	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Puppet to 5.5.2 · 5.3.7 · 1.10.13

Advisories and patches

puppet.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.08.8read 2026-10-23
NVDCVSS 2.06.5read 2026-10-23
NVDweakness (CWE)CWE-426read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2018-06-11
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-6513?

Is CVE-2018-6513 actively exploited?

Active exploitation of CVE-2018-6513 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-6513?

CVE-2018-6513 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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