CVE-2020-7742
Prototype Pollution
This affects the package simpl-schema before 1.10.2.
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 the package simpl-schema before 1.10.2.
- Record
CVE-2020-7742- 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-2021-1030
This affects the package simpl-schema before 1.10.2.
- Record
EUVD-2021-1030- 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-9mx2-prfp-8hqp
Prototype Pollution in simpl-schema
This affects the package simpl-schema before 1.10.2. Attacker controlled input into a schema could result in remote code execution within the scope of the surrounding application.
- Record
GHSA-9mx2-prfp-8hqp- 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 the package simpl-schema before 1.10.2.
- Record
CVE-2020-7742- 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 - Updated
- 2026-11-02
OSV
This affects the package simpl-schema before 1.10.2.
- Record
CVE-2020-7742- 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-9mx2-prfp-8hqp
Prototype Pollution in simpl-schema
This affects the package simpl-schema before 1.10.2. Attacker controlled input into a schema could result in remote code execution within the scope of the surrounding application.
- Record
GHSA-9mx2-prfp-8hqp- 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
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
simpl-schemanpm |
before 1.10.2 | 1.10.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2020-7742 is a high vulnerability (CVSS 7.5) in Simpl-schema Project Simpl-schema, published October 7, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.51%, the 74th percentile. Fixed in simpl-schema 1.10.2.
References
snyk.io/vuln/SNYK-JS-SIMPLSCHEMA-1016157
github.com/aldeed/simpl-schema/blob/main/package/lib/utility/merge.js
nvd.nist.gov/vuln/detail/CVE-2020-7742