CVE-2020-8147 json
Prototype Pollution
published 2020-04-03 6 y ago modified 2026-06-17 4 mo ago also GHSA-6pq3-928q-x6w6 , EUVD-2020-0822
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.1%
- EPSS 3.1% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
Flaw in input validation in npm package utils-extend version 1.0.8 and earlier may allow prototype pollution attack that may result in remote code execution or denial of service of applications using utils-extend.
Exploit prediction
3.15% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- hackerone.com https://hackerone.com/reports/801522 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | utils-extend | >=0.0.0 |
no fix listed |
Affected products
- n/a utils-extend
Classification
References
-
hackerone.com
/reports/801522
web, exploit, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-8147
advisory
-
npmjs.com
/advisories/1502
web
Sources
- CVE List CVE-2020-8147
- GitHub Advisory GHSA-6pq3-928q-x6w6
- NVD CVE-2020-8147
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.