CVE-2021-21439

MEDIUM

OTRS 6.0.1-6.0.29 and 7.0.0-7.0.26 - Denial of Service via Malicious Email URL

Title source: llm

Description

DoS attack can be performed when an email contains specially designed URL in the body. It can lead to the high CPU usage and cause low quality of service, or in extreme case bring the system to a halt. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.26 and prior versions; 8.0.x version 8.0.13 and prior versions.

References (2)

Core 2

Core References

Mailing List mailing-list

https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html

Vendor Advisory

https://otrs.com/release-notes/otrs-security-advisory-2021-09/

Scores

CVSS v3 6.5

EPSS 0.0098

EPSS Percentile 57.4%

Attack Vector NETWORK

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

Details

CWE

CWE-755 CWE-754

Status published

Products (2)

otrs/otrs 6.0.1 - 6.0.30

otrs/otrs 7.0.0 - 7.0.27

Published Jun 14, 2021

Tracked Since Feb 18, 2026