CVE-2021-36093

Name: CVE-2021-36093
Creator: NVD / NIST
Published: 2021-09-06T14:15:07.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2021-36093 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. It's possible to create an email which can be stuck while being processed by PostMaster filters, causing DoS. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

It's possible to create an email which can be stuck while being processed by PostMaster filters, causing DoS. 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 7.0.28 and prior versions; 8.0.x version 8.0.15 and prior versions.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.07%

60.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-185

Affected Software

Vendor	Product	Versions
Otrs	Otrs	>= 6.0.1
Otrs	Otrs	>= 7.0.0, < 7.0.29
Otrs	Otrs	>= 8.0.0, < 8.0.16

References

https://otrs.com/release-notes/otrs-security-advisory-2021-16/Vendor Advisory
https://otrs.com/release-notes/otrs-security-advisory-2021-16/Vendor Advisory

Timeline

Published: Sep 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36093?

How severe is CVE-2021-36093?

CVE-2021-36093 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36093?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36093?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST