CVE-2022-2421

CRITICAL 10.0

Socket.io - Improper type validation in attachment parsing

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

Due to improper type validation in attachment parsing the Socket.io js library, it is possible to overwrite the _placeholder object which allows an attacker to place references to functions at arbitrary places in the resulting query object.

CWE	CWE-89
Vendor	socket.io
Product	socket.io-parser
Published	Oct 25, 2022
Last Updated	Mar 11, 2025

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Socket.io / Socket.io-Parser

4.x < 4.2.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

csirt.divd.nl: https://csirt.divd.nl/CVE-2022-2421 csirt.divd.nl: https://csirt.divd.nl/DIVD-2022-00045

Credits

Thomas Rinsma (Codean) Victor Pasman (DIVD) Frank Breedijk (DIVD)