CVE-2021-21439

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.

• CWE-754
• CWE-755

• https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
• https://otrs.com/release-notes/otrs-security-advisory-2021-09/Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
• https://otrs.com/release-notes/otrs-security-advisory-2021-09/Vendor Advisory

Published

Jun 14, 2021

Last Modified

Jun 17, 2026

Status

Modified

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