CVE-2021-23702 json
Prototype Pollution
published 2022-02-18 4 y ago modified 2026-06-17 4 mo ago also GHSA-m639-9whg-fw97 , EUVD-2022-1091
- cvss
- 7.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.
Exploit prediction
1.38% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- snyk.io https://snyk.io/vuln/SNYK-JS-OBJECTEXTEND-2401470 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:P |
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | object-extend | <=0.5.0 |
no fix listed |
Affected products
- n/a object-extend
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
snyk.io
/vuln/SNYK-JS-OBJECTEXTEND-2401470
web, exploit, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-23702
advisory
-
github.com
/bernhardw/object-extend
package
Sources
- CVE List CVE-2021-23702
- GitHub Advisory GHSA-m639-9whg-fw97
- NVD CVE-2021-23702
Fencer Vulns 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.