CVE-2021-23328 json
Prototype Pollution
published 2021-01-29 5 y ago modified 2026-06-17 4 mo ago also GHSA-2f6g-w5gj-c93h , EUVD-2021-0737
- cvss
- 5.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 62%
- public exploits
- 0
- none known
Summary
This affects all versions of package iniparserjs. This vulnerability relates when ini_parser.js is concentrating arrays. Depending on if user input is provided, an attacker can overwrite and pollute the object prototype of a program.
Exploit prediction
0.99% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- snyk.io https://snyk.io/vuln/SNYK-JS-INIPARSERJS-1065989 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.6 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:U/RC:C |
| CNA | 3.1 | 5.6 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 5.6 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | iniparserjs | <=1.0.4 |
no fix listed |
Affected products
- n/a iniparserjs
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
snyk.io
/vuln/SNYK-JS-INIPARSERJS-1065989
web, exploit, third-party-advisory
-
npmjs.com
/package/iniparserjs
web, product, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-23328
advisory
Sources
- CVE List CVE-2021-23328
- GitHub Advisory GHSA-2f6g-w5gj-c93h
- NVD CVE-2021-23328
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