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CVE-2021-21439

MEDIUM
Published 2021-06-14T07:55:10.080008Z
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CVSS Score

V3.1
6.5
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.005
probability
of exploitation in the wild

There is a 0.5% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.654
Higher than 65.4% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

OTRS AG

((OTRS)) Community Edition

Affected Versions:

6.0.1
OTRS AG

OTRS

Affected Versions:

7.0.x 8.0.x

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-58p7-gj75-3437

Advisory Details

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.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-21439
WEB https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
WEB https://otrs.com/release-notes/otrs-security-advisory-2021-09

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: August 31, 2023

References

https://otrs.com/release-notes/otrs-security-advisory-2021-09/
https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
Published: 2021-06-14T07:55:10.080008Z
Last Modified: 2024-09-16T19:52:22.948Z
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