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CVE-2021-23346

19
FAUCET Score

CVE-2021-23346 is a medium-severity vulnerability affecting the html-parse-stringify and html-parse-stringify2 packages prior to version 2.0.1. It allows an unauthenticated attacker to cause a denial of service (freezing the process) by sending specially crafted input that triggers a regular expression backtracking issue. While the attack complexity is low and no user interaction is required, the impact is limited to availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.1CPE matchmatch criteria
cpe:2.3:a:html-parse-stringify_project:html-parse-stringify:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 69th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: html-parse-stringifyFixed in: 2.0.1
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/search-ui-rhel8

Vendor Advisories (2)

npmGHSA-545q-3fg6-48m7medium

html-parse-stringify and html-parse-stringify2 vulnerable to Regular expression denial of service (ReDoS)

Mar 18, 2021
redhatCVE-2021-23346Low

html-parse-stringify: Regular Expression DoS

Mar 1, 2021

References

github.com / HenrikJoreteg/html-parse-stringify/blob/master/lib/parse.js%23L2
Broken LinkThird Party Advisory
github.com / HenrikJoreteg/html-parse-stringify/commit/c7274a48e59c92b2b7e906fedf9065159e73fe12
PatchThird Party Advisory
github.com / rayd/html-parse-stringify2/blob/master/lib/parse.js%23L2
Broken LinkThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-1080633
ExploitPatchThird Party Advisory
snyk.io / vuln/SNYK-JS-HTMLPARSESTRINGIFY-1079306
ExploitPatchThird Party Advisory
snyk.io / vuln/SNYK-JS-HTMLPARSESTRINGIFY2-1079307
ExploitPatchThird Party Advisory