Is CVE-2018-1000154 actively exploited?

No active exploitation of CVE-2018-1000154 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-1000154 be exploited remotely?

Yes. CVE-2018-1000154 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-1000154?

CVE-2018-1000154 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2018-1000154

CWE-79Published: April 5, 2018· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

Zammad GmbH Zammad version 2.3.0 and earlier contains a Improper Neutralization of Script-Related HTML Tags in a Web Page (CWE-80) vulnerability in the subject of emails which are not html quoted in certain cases. This can result in the embedding and execution of java script code on users browser. This attack appear to be exploitable via the victim openning a ticket. This vulnerability appears to have been fixed in 2.3.1, 2.2.2 and 2.1.3.

NVD Source

Technical Analysis

CVE-2018-1000154 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.