Is CVE-2021-21441 actively exploited?

No active exploitation of CVE-2021-21441 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-21441 be exploited remotely?

Yes. CVE-2021-21441 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-21441?

CVE-2021-21441 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2021-21441

HIGH

CVE-2021-21441

CWE-79Published: June 16, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

There is a XSS vulnerability in the ticket overview screens. It's possible to collect various information by having an e-mail shown in the overview screen. Attack can be performed by sending specially crafted e-mail to the system and it doesn't require any user intraction. 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.

NVD Source

Technical Analysis

CVE-2021-21441 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

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.