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CVE-2023-4241

24
FAUCET Score

CVE-2023-4241 describes a vulnerability in the cloudflare lol-html library where specific HTML inputs can trigger a panic, leading to a denial of service. This affects any application processing untrusted, arbitrary HTML using the library. The vulnerability has a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and no user interaction required, resulting in high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, < 1.1.1CPE match
cpe:2.3:a:cloudflare:lol-html:*:*:*:*:*:rust:*:*
< 1.1.1CPE matchmatch criteria
cpe:2.3:a:cloudflare:lol-html:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
44.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 21st percentile among its peer group of 51,485 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rustpatch availablevia ghsa
Product: lol-htmlFixed in: 1.1.1
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

rustGHSA-c3x7-354f-4p2xhigh

lol-html panics on certain HTML inputs

Aug 9, 2023

References

github.com / cloudflare/lol-html/security/advisories/GHSA-c3x7-354f-4p2x
Vendor Advisory