CVE-2020-7707
Prototype Pollution
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
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
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
- Record
CVE-2020-7707- 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:U/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-0969
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
- Record
EUVD-2021-0969- 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:U/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6fw4-hr69-g3rv
Prototype Pollution in property-expr
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
- Record
GHSA-6fw4-hr69-g3rv- 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-915, CWE-1321
- Updated
- 2026-11-02
NVD
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
- Record
CVE-2020-7707- 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
OSV
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
- Record
CVE-2020-7707- 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 - Updated
- 2026-11-02
OSVGHSA-6fw4-hr69-g3rv
Prototype Pollution in property-expr
The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.
- Record
GHSA-6fw4-hr69-g3rv- 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, CWE-915
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
property-exprnpm |
before 2.0.3 | 2.0.3 |
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-2020-7707 is a critical vulnerability (CVSS 9.8) in Property-expr Project Property-expr, published August 18, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.38%, the 88th percentile. Fixed in property-expr 2.0.3.