CVE-2021-3820 json
Inefficient Regular Expression Complexity in pksunkara/inflect
published 2021-09-27 5 y ago modified 2026-06-17 4 mo ago also GHSA-x55w-vjjp-222r , EUVD-2021-2129
- cvss
- 5.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
inflect is vulnerable to Inefficient Regular Expression Complexity
Patch / fix
- npm i 0.3.7
- inflect_project inflect 0.3.7
Exploit prediction
1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/4612b31a-072b-4f61-a916-c7e4cbc2042a referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| 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 |
|---|---|---|---|
| npm | i | <0.3.7 |
0.3.7 |
Affected products
- pksunkara pksunkara/inflect
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
github.com
/pksunkara/inflect/commit/a9a0a8e9561c3487854c7cae42565d9652ec858b
web, patch, third-party-advisory
-
huntr.dev
/bounties/4612b31a-072b-4f61-a916-c7e4cbc2042a
web, exploit, issue-tracking, patch, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-3820
advisory
-
github.com
/pksunkara/inflect
package
Sources
- CVE List CVE-2021-3820
- GitHub Advisory GHSA-x55w-vjjp-222r
- NVD CVE-2021-3820
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