VDB-124535 · CVE-2018-16586 · Qualys 176506

Open Ticket Request System up to 4.0.31/5.0.29/6.0.10 Email External input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in Open Ticket Request System up to 4.0.31/5.0.29/6.0.10 (Ticket Tracking Software). This issue affects an unknown code block of the component Email Handler. The manipulation with an unknown input leads to a input validation vulnerability (External). Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In Open Ticket Request System (OTRS) 4.0.x before 4.0.32, 5.0.x before 5.0.30, and 6.0.x before 6.0.11, an attacker could send a malicious email to an OTRS system. If a logged in user opens it, the email could cause the browser to load external image or CSS resources.

The bug was discovered 09/21/2018. The weakness was published 09/28/2018 (Website). It is possible to read the advisory at lists.debian.org. The identification of this vulnerability is CVE-2018-16586 since 09/06/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117714 (Debian DLA-1521-1 : otrs2 security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176506 (Debian Security Update for otrs2 (DSA 4317-1)).

Upgrading to version 4.0.32, 5.0.30 or 6.0.11 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (117714).






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
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Name: External
Class: Input validation / External

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍


Nessus ID: 117714
Nessus Name: Debian DLA-1521-1 : otrs2 security update
Nessus File: 🔍
Nessus Risk: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Open Ticket Request System 4.0.32/5.0.30/6.0.11
Patch: github.com


09/06/2018 🔍
09/21/2018 +15 days 🔍
09/26/2018 +5 days 🔍
09/27/2018 +0 days 🔍
09/27/2018 +0 days 🔍
09/28/2018 +0 days 🔍
09/28/2018 +0 days 🔍
05/19/2023 +1694 days 🔍


Advisory: 09e80c7752b0d9080688e4597c7495dd109e0963
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-16586 (🔍)


Created: 09/28/2018 08:35 AM
Updated: 05/19/2023 10:26 AM
Changes: 09/28/2018 08:35 AM (75), 03/27/2020 04:13 PM (2), 05/19/2023 10:20 AM (5), 05/19/2023 10:26 AM (1)
Complete: 🔍
Cache ID: 34:42C:40


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