CVE-2020-7792
Prototype Pollution
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 a Prototype Pollution.
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
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 a Prototype Pollution.
- Record
CVE-2020-7792- 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-2022-1121
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 a Prototype Pollution.
- Record
EUVD-2022-1121- 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-pc58-wgmc-hfjr
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 a Prototype Pollution.
- Record
GHSA-pc58-wgmc-hfjr- 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-1321
- Updated
- 2026-11-02
NVD
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 a Prototype Pollution.
- Record
CVE-2020-7792- 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
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVGHSA-pc58-wgmc-hfjr
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 a Prototype Pollution.
- Record
GHSA-pc58-wgmc-hfjr- 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-1321
- Updated
- 2026-11-02
OSVCLSA-2026-1773620216 No score
TuxCare security update for mout (2 CVEs)
TuxCare rebuilt mout to address 2 CVEs. Fixed in 0.11.0-tuxcare.1.
- Record
CLSA-2026-1773620216- Updated
- 2026-11-02
OSVCLSA-2026-1789117092 No score
TuxCare security update for mout (1 CVE)
TuxCare rebuilt mout to address 1 CVE. Fixed in 0.11.1-tuxcare.1.
- Record
CLSA-2026-1789117092- Updated
- 2026-11-02
OSVCLSA-2026-1792759966 No score
TuxCare security update for mout (1 CVE)
TuxCare rebuilt mout to address 1 CVE. Fixed in 0.9.1-tuxcare.3.
- Record
CLSA-2026-1792759966- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moutnpm |
before 1.2.3 | 1.2.3 |
moutTuxCare:npm From an advisory covering 2 CVEs |
0.11.0-tuxcare.0 up to 0.11.0-tuxcare.1, plus listed versions 0.11.0 |
0.11.0-tuxcare.1 |
moutTuxCare:npm |
0.11.1-tuxcare.0 up to 0.11.1-tuxcare.1, plus listed versions 0.11.1 |
0.11.1-tuxcare.1 |
moutTuxCare:npm |
0.9.1-tuxcare.0 up to 0.9.1-tuxcare.3, plus listed versions 0.9.10.9.1-tuxcare.10.9.1-tuxcare.2 |
0.9.1-tuxcare.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| 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-2020-7792 is a high vulnerability (CVSS 7.5) in Moutjs Mout, published December 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. Fixed in mout 1.2.3.
References
snyk.io/vuln/SNYK-JS-MOUT-1014544
github.com/mout/mout/blob/master/src/object/deepFillIn.js
nvd.nist.gov/vuln/detail/CVE-2020-7792