What is CVE-2018-17567?

CVE-2018-17567 is a high-severity vulnerability in Jekyllrb Jekyll, classified under Improper Link Resolution Before File Access. CVSS score: 7.5/10. Published 2018-09-28.

How severe is CVE-2018-17567?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2018-17567 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Jekyllrb Jekyll

CVE-2018-17567

Jekyll through 3.6.2, 3.7.x through 3.7.3, and 3.8.x through 3.8.3 allows attackers to access arbitrary files by specifying a symlink in the "include" key in the "_config.yml" file.

Published 2018-09-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.022 (81.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Jekyllrb Jekyll

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

Public proof-of-concept exploits

References

github.com/jekyll/jekyll/pull/7224 (Patch, Third Party Advisory)
jekyllrb.com/news/2018/09/19/security-fixes-for-3-6-3-7-3-8/ (Patch, Vendor Advisory)
lists.apache.org/thread.html/71da391f584b2fb301d2df0e491b279d87287e2fb4b11309f0… (mailing-list)

Frequently asked questions

What is CVE-2018-17567?: CVE-2018-17567 is a high-severity vulnerability in Jekyllrb Jekyll, classified under Improper Link Resolution Before File Access. CVSS score: 7.5/10. Published 2018-09-28.
How severe is CVE-2018-17567?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-17567 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.