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Vulnerabilities / CVE-2020-14001

critical

CVE-2020-14001

rubygem-kramdown: processing template options inside documents allows unintended read access or embedded Ruby code execution

Published Modified CWE 862
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Trivy's own label is CRITICAL. Rated critical by NVD, GHSA, Ruby Advisory DB. Rated lower by Red Hat (high), Ubuntu (medium).

Description

The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such as template="/etc/passwd") or unintended embedded Ruby code execution (such as a string that begins with template="string://<%= `). NOTE: kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded Forum.

Affected packages and fixed versions

SourcePackageFixed in
rubygems::GitHub Security Advisory RubyGemskramdown2.3.0
rubygems::Ruby Advisory Databasekramdown>= 2.3.0
alpine 3.12icinga22.11.3-r1
alpine 3.13icinga22.11.3-r1
alpine 3.14icinga22.11.3-r1
alpine 3.15icinga22.11.3-r1
alpine 3.16icinga22.11.3-r1
alpine 3.17icinga22.11.3-r1
alpine 3.18icinga22.11.3-r1
alpine 3.19icinga22.11.3-r1
alpine 3.20icinga22.11.3-r1
alpine 3.21icinga22.11.3-r1
Show all 39 entries from 39 sources
SourcePackageFixed in
rubygems::GitHub Security Advisory RubyGemskramdown2.3.0
rubygems::Ruby Advisory Databasekramdown>= 2.3.0
alpine 3.12icinga22.11.3-r1
alpine 3.13icinga22.11.3-r1
alpine 3.14icinga22.11.3-r1
alpine 3.15icinga22.11.3-r1
alpine 3.16icinga22.11.3-r1
alpine 3.17icinga22.11.3-r1
alpine 3.18icinga22.11.3-r1
alpine 3.19icinga22.11.3-r1
alpine 3.20icinga22.11.3-r1
alpine 3.21icinga22.11.3-r1
alpine 3.22icinga22.11.3-r1
alpine 3.23icinga22.11.3-r1
alpine 3.24icinga22.11.3-r1
alpine edgeicinga22.11.3-r1
debian 10ruby-kramdown1.17.0-1+deb10u1
debian 11ruby-kramdown2.3.0-3
debian 12ruby-kramdown2.3.0-3
debian 13ruby-kramdown2.3.0-3
debian 14ruby-kramdown2.3.0-3
debian 9ruby-kramdown1.12.0-1+deb9u1
echoruby-kramdown2.3.0-3
ubuntu 18.04-ESMruby-kramdownno fix listed
ubuntu 20.04ruby-kramdown1.17.0-4ubuntu0.1
ubuntu 20.04-ESMruby-kramdown1.17.0-4ubuntu0.1
ubuntu 20.10ruby-kramdown1.17.0-4ubuntu0.20.10.1
ubuntu 21.04ruby-kramdown2.3.0-4
ubuntu 21.10ruby-kramdown2.3.0-4
ubuntu 22.04ruby-kramdown2.3.0-4
ubuntu 22.10ruby-kramdown2.3.0-4
ubuntu 23.04ruby-kramdown2.3.0-4
ubuntu 23.10ruby-kramdown2.3.0-4
ubuntu 24.04ruby-kramdown2.3.0-4
ubuntu 24.10ruby-kramdown2.3.0-4
ubuntu 25.04ruby-kramdown2.3.0-4
ubuntu 25.10ruby-kramdown2.3.0-4
ubuntu 26.04ruby-kramdown2.3.0-4
ubuntu 26.10ruby-kramdown2.3.0-4

References

All 24 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.