CVE-2020-5258

mediumpriority · track · 21EPSS 0.040 · 91 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
4.02% (91st) EPSS
CVSS 5 · medium
Is it mine?
50 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

In affected versions of dojo (NPM package), the deepCopy method is vulnerable to Prototype Pollution. Prototype Pollution refers to the ability to inject properties into existing JavaScript language construct prototypes, such as objects. An attacker manipulates these attributes to overwrite, or pollute, a JavaScript application object prototype of the base object by injecting other values. This has been patched in versions 1.12.8, 1.13.7, 1.14.6, 1.15.3 and 1.16.2

01

cvss

Technical severity, 0–10. One row per scoring source.

7.7
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.7

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9
v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:P/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU
v3.17.7highCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 1.3 · impact 5.8
v3.17.7highCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · OSV
v3.17.7highCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Nsecondary · ENISA EU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · NVD / NIST USexploitability 3.9 · impact 3.6
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1321USprimaryCWE-1321USCWE-74USCWE-74USCWE-94USCWE-94USCWE-94US
03

affected products (50)

Products and version ranges known to be affected.

showing 20 of 50
04

advisories (1)

Vendor and ecosystem advisories describing this.

  • GHSA-jxfh-8wgv-vfr2Prototype pollution in dojo2020-03-10ghsa · osvUS

    In affected versions of dojo (NPM package), the deepCopy method is vulnerable to Prototype Pollution. Prototype Pollution refers to the ability to inject properties into existing JavaScript language construct prototypes, such as objects. An attacker manipulates these attributes to overwrite, or pollute, a JavaScript application object prototype of the base object by injecting other values. This has been patched in versions 1.12.8, 1.13.7, 1.14.6, 1.15.3 and 1.16.2

05

also known as (4)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvNVDCVE.orgMITRE
published 2020-03-10modified 2026-06-17
08

references (77)

External citations — patches, advisories, analysis.

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