CVE-2020-7765
Prototype Pollution
MEDIUM
5.3
CVSS Score
Published: November 16, 2020 at 12:00 PM UTC
Updated: June 17, 2026 at 03:25 AM UTC
1 product affected across 1 vendorFirebase /util
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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.6%
Description
This affects the package @firebase/util before 0.3.4. This vulnerability relates to the deepExtend function within the DeepCopy.ts file. Depending on if user input is provided, an attacker can overwrite and pollute the object prototype of a program.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
95%
v < 0.3.4
Affected range stops below 0.3.4, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/firebase/firebase-js-sdk/commit/9cf727fcc3d049551b16ae0698ac33dc2fe45adax_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/firebase/firebase-js-sdk/pull/4001x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://snyk.io/vuln/SNYK-JS-FIREBASEUTIL-1038324CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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