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CVE-2021-23328Prototype Pollution
- 5.6MediumCVSS base score
- 0.99%Exploitation in 30 daysEPSS · top 37% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By snyk
- 21 days later
· 21 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| snykCNA (assigner) | 3.1 | Medium5.6 | 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 |
| NVDNVD · Modified | 3.1 | Medium5.6 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
- EPSS (exploitation in 30 days)
- 0.99% · top 37% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.6.
Affected products
iniparserjs
- affected < unspecified
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npminiparserjsGHSA-2f6g-w5gj-c93h (opens in a new tab)
References
References2
- https://snyk.io/vuln/SNYK-JS-INIPARSERJS-1065989 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.npmjs.com/package/iniparserjs (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-0737 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-2f6g-w5gj-c93h (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-23328)Record last updated .