CVE-2023-5421
CWE-20Published: October 16, 2023· Updated: Jun 17, 2026
Official Description
An attacker who is logged into OTRS as an user with privileges to create and change customer user data may manipulate the CustomerID field to execute JavaScript code that runs
immediatly after the data is saved.The issue onlyoccurs if the configuration for AdminCustomerUser::UseAutoComplete was changed before.
This issue affects OTRS: from 7.0.X before 7.0.47, from 8.0.X before 8.0.37; ((OTRS)) Community Edition: from 6.0.X through 6.0.34.
Technical Analysis
CVE-2023-5421 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
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.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-5421 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts