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CVE-2020-7707Prototype Pollution
- 9.8CriticalCVSS base score
- 3.4%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
Timeline
ID reserved
By snyk
- 7 months later
· 7 months 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 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 3.4% · top 11% of all CVEs (12 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
property-expr
- affected unspecified – < 2.0.3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmproperty-exprGHSA-6fw4-hr69-g3rv (opens in a new tab)
References
References3
- https://snyk.io/vuln/SNYK-JS-PROPERTYEXPR-598800 (opens in a new tab)x_refsource_MISCx_transferred
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-598857 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/jquense/expr/commit/df846910915d59f711ce63c1f817815bceab5ff7 (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-2021-0969 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-6fw4-hr69-g3rv (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-2020-7707)Record last updated .