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CVE-2020-5258

Prototype pollution in dojo

7.7 HighFix available

CVE-2020-5258 is a high vulnerability (CVSS 7.7) in Dojo, published March 10, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.02%, the 90th percentile. Fixed in dojo 1.11.10.

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

4.02%Down 3.0 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.7

Prototype pollution in dojo

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

Record
CVE-2020-5258
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-94
Updated
2026-11-02
EUVDEUVD-2020-0349 7.7

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

Record
EUVD-2020-0349
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-jxfh-8wgv-vfr2 7.7

Prototype pollution in dojo

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

Record
GHSA-jxfh-8wgv-vfr2
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-74, CWE-94, CWE-1321
Updated
2026-11-02
NVD 7.7

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

Record
CVE-2020-5258
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness
CWE-94, CWE-1321
Updated
2026-11-02
OSV 7.7

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

Record
CVE-2020-5258
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2020-5258 7.7

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

Record
DEBIAN-CVE-2020-5258
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated
2026-11-02
OSVGHSA-jxfh-8wgv-vfr2 7.7

Prototype pollution in dojo

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

Record
GHSA-jxfh-8wgv-vfr2
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-1321, CWE-74, CWE-94
Updated
2026-11-02
OSVUBUNTU-CVE-2020-5258 7.7

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

Record
UBUNTU-CVE-2020-5258
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVMGASA-2020-0232 No score

Updated dojo packages fix security vulnerability

Updated dojo package fixes security vulnerabilities:

In affected versions of dojo, the deepCopy method is vulnerable to prototype Pollution. An attacker could manipulate these attributes to overwrite, or pollute, a JavaScript application object prototype of the base object by injecting other values (CVE-2020-5258).

The Dojox jQuery wrapper jqMix mixin method is vulnerable to Prototype Pollution. An attacker could manipulate these attributes to overwrite, or pollute, a JavaScript application object prototype of the base object by injecting other values (CVE-2020-5259).

Record
MGASA-2020-0232
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
dojo
npm
before 1.11.10
1.11.10
dojo
npm
1.12.0 up to 1.12.8
1.12.8
dojo
npm
1.13.0 up to 1.13.7
1.13.7
dojo
npm
1.14.0 up to 1.14.6
1.14.6
dojo
npm
1.15.0 up to 1.15.3
1.15.3
dojo
npm
1.16.0 up to 1.16.2
1.16.2
dojo
Debian:12
before 1.15.3+dfsg1-1
1.15.3+dfsg1-1
dojo
Debian:13
before 1.15.3+dfsg1-1
1.15.3+dfsg1-1
dojo
Debian:14
before 1.15.3+dfsg1-1
1.15.3+dfsg1-1
dojo
Debian:8
before 1.10.2+dfsg-1+deb8u3, plus listed versions
1.10.2+dfsg-11.10.2+dfsg-1+deb8u11.10.2+dfsg-1+deb8u2
1.10.2+dfsg-1+deb8u3
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Affected packages
PackageAffectedFixed
dojo
Mageia:7
before 1.14.6-1.mga7
1.14.6-1.mga7
dojo
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
1.10.4+dfsg-21.10.4+dfsg-2ubuntu0.1~esm1
None known
dojo
Ubuntu:18.04:LTS
All versions, plus listed versions
1.11.0+dfsg-1
None known
dojo
Ubuntu:Pro:20.04:LTS
All versions, plus listed versions
1.14.2+dfsg1-11.15.0+dfsg1-11.15.0+dfsg1-1ubuntu0.1~esm1
None known

History

History
WhenChangedSources
2026-11-02createdCVE List, EUVD, GitHub Advisories, NVD, OSV

References

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