What is CVE-2021-21438?

CVE-2021-21438 is a low-severity vulnerability in Otrs Faq, classified under CWE-264. CVSS score: 3.5/10. Published 2021-03-22.

How severe is CVE-2021-21438?

Low severity. CVSS v3 base score is 3.5 out of 10.

Vulnerability in Otrs Faq

CVE-2021-21438

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.

Published 2021-03-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Otrs Faq
Otrs
Otrs Ag Faq — versions 6.0.x
Otrs Ag — versions unspecified

Weakness classification (CWE)

References

otrs.com/release-notes/otrs-security-advisory-2021-08/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-21438?: CVE-2021-21438 is a low-severity vulnerability in Otrs Faq, classified under CWE-264. CVSS score: 3.5/10. Published 2021-03-22.
How severe is CVE-2021-21438?: Low severity. CVSS v3 base score is 3.5 out of 10.