CVE-2020-19952: Cross Site Scripting (XSS) vulnerability in Rendering Engine in jbt Markdown Editor thru commit 2252418c27dffb

Q: How do I fix CVE-2020-19952?

live \(github-flavored\) markdown editor: upgrade to 2019-10-27. Exact commands for each OS are on this page.

Q: Is CVE-2020-19952 being exploited?

CVE-2020-19952 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-19952 affect?

CVE-2020-19952 affects live \(github-flavored\) markdown editor. Severity is medium (CVSS 6.1). Cross Site Scripting (XSS) vulnerability in Rendering Engine in jbt Markdown Editor thru commit 2252418c27dffbb35147acd8ed324822b8919477, allows remote attackers to execute arbirary code via crafted payload or opening malicious .md file.

Q: How urgent is CVE-2020-19952?

Priority 39/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2020-19952 is a medium-severity flaw (CVSS 6.1) affecting live \(github-flavored\) markdown editor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in Rendering Engine in jbt Markdown Editor thru commit 2252418c27dffbb35147acd8ed324822b8919477, allows remote attackers to execute arbirary code via crafted payload or opening malicious .md file.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-08-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jbt

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-08-11 14:15 UTCPublished CVE record published
2026-06-17 03:00 UTCUpdated Record last modified

jbt live \(github-flavored\) markdown editor UPGRADE

Affected: < 2019-10-27

Fixed in: 2019-10-27

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy live-github-flavored-markdown-editor || rpm -q live-github-flavored-markdown-editor || live-github-flavored-markdown-editor --version

2. UPGRADE to 2019-10-27 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade live-github-flavored-markdown-editor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade live-github-flavored-markdown-editor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-19952?

live \(github-flavored\) markdown editor: upgrade to 2019-10-27. Exact commands for each OS are on this page.

Is CVE-2020-19952 being exploited?

CVE-2020-19952 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-19952 affect?

CVE-2020-19952 affects live \(github-flavored\) markdown editor. Severity is medium (CVSS 6.1). Cross Site Scripting (XSS) vulnerability in Rendering Engine in jbt Markdown Editor thru commit 2252418c27dffbb35147acd8ed324822b8919477, allows remote attackers to execute arbirary code via crafted payload or opening malicious .md file.

How urgent is CVE-2020-19952?

Priority 39/100. Public exploit reference

Software pages

GitHub vulnerabilities

References

← Back to latest CVEs