CVE-2021-23346: This affects the package html-parse-stringify before 2.0.1; all versions of package html-parse-stringify2

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MEDIUM 4.8REMOTEUPGRADE

CVE-2021-23346 is a medium-severity flaw (CVSS 4.8) affecting html-parse-stringify. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects the package html-parse-stringify before 2.0.1; all versions of package html-parse-stringify2. Sending certain input could cause one of the regular expressions that is used for parsing to backtrack, freezing the process.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Published	2021-03-04
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: html-parse-stringify project

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

Am I affected?

Timeline

2021-03-04 17:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

html-parse-stringify project html-parse-stringify UPGRADE

Affected: < 2.0.1

Fixed in: 2.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls html-parse-stringify

2. UPGRADE to 2.0.1

npm install html-parse-stringify@">=2.0.1"

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-2021-23346?

html-parse-stringify: upgrade to 2.0.1. Exact commands for each OS are on this page.

Is CVE-2021-23346 being exploited?

CVE-2021-23346 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-2021-23346 affect?

CVE-2021-23346 affects html-parse-stringify. Severity is medium (CVSS 4.8). This affects the package html-parse-stringify before 2.0.1; all versions of package html-parse-stringify2. Sending certain input could cause one of the regular expressions that is used for parsing to backtrack, freezing the process.

How urgent is CVE-2021-23346?

Priority 47/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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