CVE-2021-42084

6.5 mediumEPSS 0.9%

Medium (6.5) in zammad zammad. EPSS 0.9% chance of exploitation in the next 30 days.

An issue was discovered in Zammad before 4.1.1. An attacker with valid agent credentials may send a series of crafted requests that cause an endless loop and thus cause denial of service.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)
CWE: CWE-835
Published: 2021-10-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zammad:zammad

References

https://zammad.com/en/advisories/zaa-2021-11
https://zammad.com/en/advisories/zaa-2021-11

Check your stack JSON