What’s Vulnerable › Vulnerabilities

CVE-2021-4264: LinkedIn dustjs prototype pollution

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-12-21 · updated 2026-06-17
• Weakness: CWE-1321

Description

A vulnerability was found in LinkedIn dustjs up to 2.x and classified as problematic. Affected by this issue is some unknown functionality. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.0.0 is able to address this issue. The name of the patch is ddb6523832465d38c9d80189e9de60519ac307c3. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216464.

Affected products

• LinkedIn dustjs: before 3.0.0 — fixed in 3.0.0

How to fix

Upgrade to a fixed version: LinkedIn dustjs 3.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/linkedin/dustjs/commit/ddb6523832465d38c9d80189e9de60519ac307c3
• https://github.com/linkedin/dustjs/issues/804
• https://github.com/linkedin/dustjs/pull/805
• https://github.com/linkedin/dustjs/releases/tag/v3.0.0
• https://vuldb.com/?ctiid.216464
• https://vuldb.com/?id.216464
• https://github.com/linkedin/dustjs/commit/ddb6523832465d38c9d80189e9de60519ac307c3
• https://github.com/linkedin/dustjs/issues/804
• https://github.com/linkedin/dustjs/pull/805
• https://github.com/linkedin/dustjs/releases/tag/v3.0.0
• https://vuldb.com/?ctiid.216464
• https://vuldb.com/?id.216464

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