CVE-2023-4241 json
lol-html panics on certain HTML inputs
published 3y ago modified 4mo ago also GHSA-c3x7-354f-4p2x , EUVD-2023-2267
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
lol-html can cause panics on certain HTML inputs. Anyone processing arbitrary 3rd party HTML with the library is affected.
Patch / fix
- crates.io lol-html 1.1.1
- Cloudflare lol-html 1.1.1
Is CVE-2023-4241 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2y ago
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-14).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | lol-html | <1.1.1 |
1.1.1 |
Affected products
- Cloudflare lol-html
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/cloudflare/lol-html/security/advisories/GHSA-c3x7-354f-4p2x
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-4241
advisory
-
github.com
/cloudflare/lol-html
package
Sources
- CVE List CVE-2023-4241
- GitHub Advisory GHSA-c3x7-354f-4p2x
- NVD CVE-2023-4241
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.