CVE-2021-42090

CRITICAL

Zammad < 4.1.1 - Insecure Deserialization

Title source: rule

Description

An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because deserialization is mishandled.

Scores

CVSS v3 9.8
EPSS 0.0493
EPSS Percentile 89.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

CWE
CWE-502
Status published

Affected Products (1)

zammad/zammad < 4.1.1

Timeline

Published Oct 07, 2021
Tracked Since Feb 18, 2026