CVE-2017-11593: Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows

Q: How do I fix CVE-2017-11593?

markdown preview plus: upgrade to newer than 0.4.5. Exact commands for each OS are on this page.

Q: Is CVE-2017-11593 being exploited?

CVE-2017-11593 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-2017-11593 affect?

CVE-2017-11593 affects markdown preview plus. Severity is medium (CVSS 6.1). Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject arbitrary web script or HTML into some web applications via the upload and display of crafted text, ma

Q: How urgent is CVE-2017-11593?

Priority 40/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2017-11593 is a medium-severity flaw (CVSS 6.1) affecting markdown preview plus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject arbitrary web script or HTML into some web applications via the upload and display of crafted text, markdown, or rst files that are designed to be viewed in the browser as plain text, but that will be converted to HTML without proper sanitization.

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	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-07-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ooso

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

Am I affected?

Timeline

2017-07-24 01:29 UTCPublished CVE record published
2026-06-17 01:02 UTCUpdated Record last modified

ooso markdown preview plus UPGRADE

Affected: <= 0.4.5

Fixed in: newer than 0.4.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy markdown-preview-plus || rpm -q markdown-preview-plus || markdown-preview-plus --version

2. UPGRADE to newer than 0.4.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade markdown-preview-plus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade markdown-preview-plus

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-2017-11593?

markdown preview plus: upgrade to newer than 0.4.5. Exact commands for each OS are on this page.

Is CVE-2017-11593 being exploited?

CVE-2017-11593 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-2017-11593 affect?

CVE-2017-11593 affects markdown preview plus. Severity is medium (CVSS 6.1). Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject arbitrary web script or HTML into some web applications via the upload and display of crafted text, ma

How urgent is CVE-2017-11593?

Priority 40/100. Public exploit reference

Software pages

Google Chrome vulnerabilities

References

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