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CVE-2020-8158

24
FAUCET Score

CVE-2020-8158 is a critical prototype pollution vulnerability affecting TypeORM package versions prior to 0.2.25. This flaw allows unauthenticated attackers to add or modify JavaScript Object properties, potentially leading to severe impacts such as denial of service or SQL injection. With a CVSS score of 9.8, it represents a high-severity risk due to its network-based attack vector and low attack complexity. While no active exploitation, public exploit code, or significant community discussion has been observed, the potential for severe consequences necessitates immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.2.25CPE matchmatch criteria
cpe:2.3:a:typeorm:typeorm:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.12%
Probability of exploitation in next 30 days
EPSS Percentile
79.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0212 is in the 69th percentile among its peer group of 36,833 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: typeormFixed in: 0.2.25

Vendor Advisories (1)

npmGHSA-pf2j-9qmp-jqr2critical

TypeORM vulnerable to MAID and Prototype Pollution

May 7, 2021

References

hackerone.com / reports/869574
ExploitPatchThird Party Advisory