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CVE-2020-28503

31
FAUCET Score

CVE-2020-28503 is a critical Prototype Pollution vulnerability affecting the 'copy-props' package prior to version 2.0.5, specifically impacting gulpjs copy_props. With a CVSS score of 9.8, it allows unauthenticated attackers to remotely execute arbitrary code with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.5CPE matchmatch criteria
cpe:2.3:a:gulpjs:copy-props:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.70%
Probability of exploitation in next 30 days
EPSS Percentile
74.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0170 is in the 63rd percentile among its peer group of 36,835 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: copy-propsFixed in: 2.0.5

Vendor Advisories (1)

npmGHSA-897m-rjf5-jp39high

Prototype Pollution in copy-props

Jan 6, 2022

References

github.com / gulpjs/copy-props/pull/7
PatchThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-1088047
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JS-COPYPROPS-1082870
ExploitThird Party Advisory