CVE-2021-21436Network attack vector

Authenticated access to restricted configuration items

Published Feb 8, 2021 · Updated Sep 17, 2024

Missing authorization in OTRS AG CIs in Customer Frontend 7.0.0 through 7.0.14 allows remote authenticated users to view and link restricted CIs. The vendor states that agents can see and link configuration items defined in General Catalog without the required permissions, but does not identify the responsible code path or failed check. An agent account and interaction with the network interface are required; the reported consequence is limited to unauthorized configuration-item disclosure and linking.

CVSS severity3.5
Low
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in OTRS AG CIs in Customer Frontend 7.0.0 through 7.0.14 allows remote authenticated users to view and link restricted CIs. The vendor states that agents can see and link configuration items defined in General Catalog without the required permissions, but does not identify the responsible code path or failed check. An agent account and interaction with the network interface are required; the reported consequence is limited to unauthorized configuration-item disclosure and linking.

The record

CVE
CVE-2021-21436
Published
Feb 8, 2021
Updated
Sep 17, 2024
Vendor
OTRS AG
Product
CIs in Customer Frontend
Classifications
CWE-276, CWE-264, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=7.0.x <=7.0.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OTRS AG · CIs in Customer Frontendversion=7.0.x <=7.0.14

Published CVSS scores

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
3.5OTRS AGCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/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-276Incorrect Default Permissions
CWE-264Permissions, Privileges, and Access Controls
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

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Your stack

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