CVE-2020-8158
TypeORM vulnerable to MAID and Prototype Pollution
Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.
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
NVD Score used
Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.
- Record
CVE-2020-8158- 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-471, CWE-1321
- Updated
- 2026-11-02
CVE List No score
Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.
- Record
CVE-2020-8158- Weakness
- CWE-471
- Updated
- 2026-11-02
EUVDEUVD-2021-1149 No score
Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.
- Record
EUVD-2021-1149- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pf2j-9qmp-jqr2
TypeORM vulnerable to MAID and Prototype Pollution
Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.
- Record
GHSA-pf2j-9qmp-jqr2- 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-471, CWE-1321
- Updated
- 2026-11-02
OSV
Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.
- Record
CVE-2020-8158- 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-pf2j-9qmp-jqr2
TypeORM vulnerable to MAID and Prototype Pollution
Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.
- Record
GHSA-pf2j-9qmp-jqr2- 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-471
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
typeormnpm |
before 0.2.25 | 0.2.25 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | open-flaw/CVE-2020-8158 | 2025-12-08 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-8158 is a critical vulnerability (CVSS 9.8) in Typeorm, published September 18, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.12%, the 81st percentile. Fixed in typeorm 0.2.25.