CVE-2018-1000162: Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in `setMarkupEscaped` for

Q: How do I fix CVE-2018-1000162?

parsedown: upgrade to 1.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2018-1000162 being exploited?

CVE-2018-1000162 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-2018-1000162 affect?

CVE-2018-1000162 affects parsedown. Severity is medium (CVSS 6.1). Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in `setMarkupEscaped` for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown

Q: How urgent is CVE-2018-1000162?

Priority 38/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2018-1000162 is a medium-severity flaw (CVSS 6.1) affecting parsedown. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in `setMarkupEscaped` for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.

Why this priority

No elevated risk signals yet

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	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-04-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: parsedown

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

Am I affected?

Timeline

2018-04-18 19:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

parsedown parsedown UPGRADE

Affected: < 1.7.0

Fixed in: 1.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy parsedown || rpm -q parsedown || parsedown --version

2. UPGRADE to 1.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade parsedown

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade parsedown

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-2018-1000162?

parsedown: upgrade to 1.7.0. Exact commands for each OS are on this page.

Is CVE-2018-1000162 being exploited?

CVE-2018-1000162 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-2018-1000162 affect?

CVE-2018-1000162 affects parsedown. Severity is medium (CVSS 6.1). Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in `setMarkupEscaped` for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown

How urgent is CVE-2018-1000162?

Priority 38/100. No elevated risk signals yet.

Related CVEs

CVE-2019-10905 HIGH 8.1 UPGRADE Parsedown before 1.7.2, when safe mode is used and HTML markup is disabled, might allow attackers to execute a

References

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