Prototype Pollution in mout
This affects all versions of package mout. The deepFillIn function can be used to 'fill missing properties recursively', while the deepMixIn mixes objects into the target object, recursively mixing existing child objects as well. In both cases, the key used to access the target object recursively is not checked, leading to exploiting this vulnerability. Note: This vulnerability derives from an incomplete fix of CVE-2020-7792.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | mout | < 1.2.4 | 1.2.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2022-21213
- https://github.com/mout/mout/pull/279
- https://github.com/mout/mout/commit/17ffdc2a96417a63a0147156dc045e90d0d14c64
- https://github.com/mout/mout
- https://github.com/mout/mout/blob/master/src/object/deepFillIn.js
- https://github.com/mout/mout/blob/master/src/object/deepMixIn.js
- https://snyk.io/vuln/SNYK-JS-MOUT-2342654
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
mout- Disclosed
- 18.06.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vvv8-xw5f-3f88 - CC BY 4.0
Vulnerability history: mout
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 02.2022 06.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
Disclosures per year
- 2022: 2
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Prototype Pollution in mout this entry
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