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Vulnerability details: VCID-3d1k-b4zg-aaar
Vulnerability ID VCID-3d1k-b4zg-aaar
Aliases CVE-2021-21439
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
System Score Found at
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00109 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
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epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00325 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.00433 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
epss 0.0051 https://api.first.org/data/v1/epss?cve=CVE-2021-21439
cvssv3.1 6.5 https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-21439
cvssv3 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-21439
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-21439
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Found at https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21439
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21439
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21439
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Exploit Prediction Scoring System (EPSS)
Percentile 0.44848
EPSS Score 0.00109
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.