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CVE-2020-7707

30
FAUCET Score

CVE-2020-7707 is a critical Prototype Pollution vulnerability affecting the 'property-expr' package prior to version 2.0.3. This flaw allows an unauthenticated attacker to remotely execute arbitrary code or cause a denial of service due to its high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.3CPE matchmatch criteria
cpe:2.3:a:property-expr_project:property-expr:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.38%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0338 is in the 80th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: property-exprFixed in: 2.0.3

Vendor Advisories (1)

npmGHSA-6fw4-hr69-g3rvcritical

Prototype Pollution in property-expr

May 6, 2021

References

github.com / jquense/expr/commit/df846910915d59f711ce63c1f817815bceab5ff7
PatchThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-598857
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JS-PROPERTYEXPR-598800
ExploitThird Party Advisory