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Public proof of conceptFix available

CVE-2020-8158

A public proof of concept exists; no exploitation attested.

  • Published2020-09-18
  • Fixed in0.2.25
  • WeaknessCWE-1321 · CWE-471

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2020-09-1821:15CVE publishedNVD

Versions per branch

NVD · OSV
Typeorm
BranchAffectedFixed in
0.2< 0.2.250.2.25

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Typeorm to 0.2.25

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • CNAweakness (CWE)CWE-471known since 2026-10-23
  • NVDweakness (CWE)CWE-1321read 2026-10-23
  • FIRST EPSSEPSS score2.1 %2026-11-08
  • PoC-in-GitHubproof of concept1known since 2026-11-01
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryCRITICAL2021-04-28

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2020-09-18
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-pf2j-9qmp-jqr2

Frequently asked questions

What is CVE-2020-8158?

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.

Is CVE-2020-8158 actively exploited?

Active exploitation of CVE-2020-8158 has not been confirmed. Its EPSS score was 2.1% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8158?

CVE-2020-8158 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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