9.8

CVE-2020-28503: Prototype Pollution

Modified
AliasesGHSA-897m-rjf5-jp39
Published 23-03-2021Last modified 17-09-2024

Vulnerability summary

CVE-2020-28503 is a critical (CVSS 9.8) vulnerability in gulpjs copy-props. EPSS estimates a 1.70% chance of exploitation in the next 30 days, higher than 77.1% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Prioritisepublic exploit

Public exploit (reference, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.70%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2reference

Timeline

  1. 23-03-2021
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.70%

Chance of exploitation in the next 30 days

Percentile

77%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.70% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Gulpjs1 product
Npm1 product
  • copy-props< 2.0.5

2 vendors · 2 products

References

5 links