CVE-2021-21437Network attack vector

Configuration-item disclosure via missing permission enforcement

Published Mar 22, 2021 · Updated Sep 16, 2024

Missing authorization in OTRS CIs In Customer Frontend 7.0.15 and earlier allows remote authenticated users to view linked configuration items. ITSM Configuration Management 7.0.24 and earlier and the frontend package return linked items defined in the General Catalog without enforcing the agent's item permissions; OTRS has not disclosed the responsible function or request path. An authenticated agent account and user interaction are required; exposure is limited to unauthorized reading, with no reported modification or service interruption.

CVSS severity3.5
Low
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Missing authorization in OTRS CIs In Customer Frontend 7.0.15 and earlier allows remote authenticated users to view linked configuration items. ITSM Configuration Management 7.0.24 and earlier and the frontend package return linked items defined in the General Catalog without enforcing the agent's item permissions; OTRS has not disclosed the responsible function or request path. An authenticated agent account and user interaction are required; exposure is limited to unauthorized reading, with no reported modification or service interruption.

The record

CVE
CVE-2021-21437
Published
Mar 22, 2021
Updated
Sep 16, 2024
Vendor
OTRS AG
Product
ITSM Configuration Management
Classifications
CWE-264, CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.x <=7.0.24

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OTRS AG · ITSM Configuration Managementversion=7.0.x <=7.0.24
OTRS AG · OTRS CIs In Customer Frontendversion=7.0.x <=7.0.15

Published CVSS scores

3.5OTRS AGCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-264Permissions, Privileges, and Access Controls
CWE-862Missing Authorization
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo