CVE-2020-7713
Prototype Pollution
All versions of package arr-flatten-unflatten are vulnerable to Prototype Pollution via the constructor.
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
All versions of package arr-flatten-unflatten are vulnerable to Prototype Pollution via the constructor.
- Record
CVE-2020-7713- 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/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-1215
All versions of package arr-flatten-unflatten are vulnerable to Prototype Pollution via the constructor.
- Record
EUVD-2021-1215- 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/E:P/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w8f3-pvx4-4c3h
Prototype Pollution in arr-flatten-unflatten
All versions of package arr-flatten-unflatten up to and including version 1.1.4 are vulnerable to Prototype Pollution via the constructor.
- Record
GHSA-w8f3-pvx4-4c3h- 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 - Weakness
- CWE-1321
- Updated
- 2026-11-02
NVD
All versions of package arr-flatten-unflatten are vulnerable to Prototype Pollution via the constructor.
- Record
CVE-2020-7713- 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 - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVGHSA-w8f3-pvx4-4c3h
Prototype Pollution in arr-flatten-unflatten
All versions of package arr-flatten-unflatten up to and including version 1.1.4 are vulnerable to Prototype Pollution via the constructor.
- Record
GHSA-w8f3-pvx4-4c3h- 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 - Weakness
- CWE-1321
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
arr-flatten-unflattennpm |
through 1.1.4 | None known |
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-2020-7713 is a critical vulnerability (CVSS 9.8) in Arr-flatten-unflatten Project Arr-flatten-unflatten, published September 1, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.92%, the 79th percentile. No source names a fixed version.