CVE-2021-21438: FAQ articles are shown to users without permission

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-22 · updated 2026-06-17
Weakness: CWE-264

Description

Agents are able to see linked FAQ articles without permissions (defined in FAQ Category). This issue affects: FAQ version 6.0.29 and prior versions, OTRS version 7.0.24 and prior versions.

Affected products

OTRS AG FAQ: from 6.0.0 before 6.0.29 — fixed in 6.0.29
OTRS AG OTRS: from 7.0.0 before 7.0.24 — fixed in 7.0.24

How to fix

Upgrade to a fixed version: OTRS AG FAQ 6.0.29; OTRS AG OTRS 7.0.24. Check the vendor advisory for mitigations.

References

https://otrs.com/release-notes/otrs-security-advisory-2021-08/
https://otrs.com/release-notes/otrs-security-advisory-2021-08/

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