CVE-2020-28503
Prototype Pollution
The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.
- Record
CVE-2020-28503- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O - Updated
- 2026-11-02
EUVDEUVD-2022-0525
The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.
- Record
EUVD-2022-0525- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-897m-rjf5-jp39
Prototype Pollution in copy-props
The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.
- Record
GHSA-897m-rjf5-jp39- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-1321
- Updated
- 2026-11-02
NVD
The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.
- Record
CVE-2020-28503- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
OSV
The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.
- Record
CVE-2020-28503- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-897m-rjf5-jp39
Prototype Pollution in copy-props
The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.
- Record
GHSA-897m-rjf5-jp39- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-1321
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
copy-propsnpm |
before 2.0.5 | 2.0.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28503 is a high vulnerability (CVSS 7.3) in Gulpjs Copy-props, published March 23, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.70%, the 77th percentile. Fixed in copy-props 2.0.5.