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CVE-2020-14001

CRITICAL
9.8
CVSS Score
Published: July 17, 2020 at 03:27 PM UTC
Updated: June 17, 2026 at 02:54 AM UTC
4 products affected across 4 vendorsDebian LinuxFedoraUbuntu Linux

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Severity
CRITICAL9.8
Exploit prediction
EPSS 5%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
20.04
Debian Linux· Debiandrupal
95%
10.09.0
Fedora· Fedora Projectrpm
95%
3132
Kramdown· Kramdown Projectrubygems
95%
v < 2.3.0
Affected range stops below 2.3.0, so it looks safe — our inference, not a vendor statement

References (13)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/gettalong/kramdown
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0
x_refsource_MISCVendor Advisory
Source: [email protected]
https://kramdown.gettalong.org
x_refsource_CONFIRMRelease NotesVendor Advisory
Source: [email protected]
https://kramdown.gettalong.org/news.html
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r96df7899fbb456fe2705882f710a0c8e8614b573fbffd8d12e3f54d2%40%3Cnotifications.fluo.apache.org%3E
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/08/msg00014.html
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ENMMGKHRQIZ3QKGOMBBBGB6B4LB5I7NQ/

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-862

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