VulnerabilityModified
CVE-2020-7644
fun-map through 3.3.1 is vulnerable to Prototype Pollution.
HIGH 8.1EPSS 1.22%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
fun-map through 3.3.1 is vulnerable to Prototype Pollution. The function assocInM could be tricked into adding or modifying properties of 'Object.prototype' using a '__proto__' payload.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.22% probability · 68th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-1321
- Affected
- fun-map project/fun-map
- Source
- report@snyk.io
EPSS 1.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/nathan7/fun-map/blob/master/index.js#L137%2C
- https://snyk.io/vuln/SNYK-JS-FUNMAP-564436Exploit, Mitigation, Third Party Advisory
- https://github.com/nathan7/fun-map/blob/master/index.js#L137%2C
- https://snyk.io/vuln/SNYK-JS-FUNMAP-564436Exploit, Mitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.