What is CVE-2021-21436?

CVE-2021-21436 is a low-severity vulnerability in Otrs Cis In Customer Frontend, classified under CWE-264. CVSS score: 3.5/10. Published 2021-02-08.

How severe is CVE-2021-21436?

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

Vulnerability in Otrs Cis In Customer Frontend

CVE-2021-21436

Agents are able to see and link Config Items without permissions, which are defined in General Catalog. This issue affects: OTRS AG OTRSCIsInCustomerFrontend 7.0.x version 7.0.14 and prior versions.

Published 2021-02-08 · 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: 0.008 (53.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Otrs Cis In Customer Frontend
Otrs Ag Otrscisincustomerfrontend — versions 7.0.x

Weakness classification (CWE)

References

otrs.com/release-notes/otrs-security-advisory-2021-04/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-21436?: CVE-2021-21436 is a low-severity vulnerability in Otrs Cis In Customer Frontend, classified under CWE-264. CVSS score: 3.5/10. Published 2021-02-08.
How severe is CVE-2021-21436?: Low severity. CVSS v3 base score is 3.5 out of 10.