CVE-2021-32818: haml-coffee is a JavaScript templating solution

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HIGH 7.7UPGRADE

CVE-2021-32818 is a high-severity flaw (CVSS 7.7) affecting haml-coffee. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

haml-coffee is a JavaScript templating solution. haml-coffee mixes pure template data with engine configuration options through the Express render API. More specifically, haml-coffee supports overriding a series of HTML helper functions through its configuration options. A vulnerable application that passes user controlled request objects to the haml-coffee template engine may introduce RCE vulnerabilities. Additionally control over the escapeHtm

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-05-14
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: haml-coffee project

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

Am I affected?

Timeline

2021-05-14 19:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

haml-coffee project haml-coffee UPGRADE

Affected: <= 1.14.1

Fixed in: newer than 1.14.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls haml-coffee

2. UPGRADE to newer than 1.14.1

npm install haml-coffee@">1.14.1"

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-2021-32818?

haml-coffee: upgrade to newer than 1.14.1. Exact commands for each OS are on this page.

Is CVE-2021-32818 being exploited?

CVE-2021-32818 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-2021-32818 affect?

CVE-2021-32818 affects haml-coffee. Severity is high (CVSS 7.7). haml-coffee is a JavaScript templating solution. haml-coffee mixes pure template data with engine configuration options through the Express render API. More specifically, haml-coffee supports overriding a series of HTML helper functions thr

How urgent is CVE-2021-32818?

Priority 45/100. High severity; Public exploit reference

References

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