CVE-2021-23329
Prototype Pollution
The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.
- Record
CVE-2021-23329- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
EUVDEUVD-2021-0543
The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.
- Record
EUVD-2021-0543- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c497-v8pv-ch6x
Prototype pollution in nested-object-assign
The package nested-object-assign before 1.0.4 is vulnerable to Prototype Pollution via the default function.
- Record
GHSA-c497-v8pv-ch6x- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
NVD
The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.
- Record
CVE-2021-23329- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSV
The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.
- Record
CVE-2021-23329- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-c497-v8pv-ch6x
Prototype pollution in nested-object-assign
The package nested-object-assign before 1.0.4 is vulnerable to Prototype Pollution via the default function.
- Record
GHSA-c497-v8pv-ch6x- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVROOT-APP-NPM-CVE-2021-23329 No score
CVE-2021-23329 in nested-object-assign - Patched by Root
Root has patched CVE-2021-23329 in the nested-object-assign package for Root:npm. Multiple fixed versions available.
- Record
ROOT-APP-NPM-CVE-2021-23329- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nested-object-assignnpm |
before 1.0.4 | 1.0.4 |
nested-object-assignRoot:npm |
before 1.0.3-aikido.1 | 1.0.3-aikido.1 |
@rootio/nested-object-assignRoot:npm |
before 1.0.3-root.io.1 | 1.0.3-root.io.1 |
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-2021-23329 is a high vulnerability (CVSS 7.5) in Getadigital Nested-object-assign, published January 31, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.54%, the 75th percentile. Fixed in nested-object-assign 1.0.4.