CVE-2021-33420

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-12-15 · updated 2026-06-17
Weakness: CWE-502

Description

A deserialization issue discovered in inikulin replicator before 1.0.4 allows remote attackers to run arbitrary code via the fromSerializable function in TypedArray object.

Affected products

Replicator Project Replicator: before 1.0.4 — fixed in 1.0.4

How to fix

Upgrade to a fixed version: Replicator Project Replicator 1.0.4. Check the vendor advisory for mitigations.

References

https://advisory.checkmarx.net/advisory/CX-2021-4787
https://github.com/inikulin/replicator/commit/2c626242fb4a118855262c64b5731b2ce98e521b
https://github.com/inikulin/replicator/issues/16
https://github.com/inikulin/replicator/pull/17
https://advisory.checkmarx.net/advisory/CX-2021-4787
https://github.com/inikulin/replicator/commit/2c626242fb4a118855262c64b5731b2ce98e521b
https://github.com/inikulin/replicator/issues/16
https://github.com/inikulin/replicator/pull/17

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