What is CVE-2021-29238?

CVE-2021-29238 is a high-severity vulnerability in Codesys Automation Server, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-05-03.

How severe is CVE-2021-29238?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in Codesys Automation Server

CVE-2021-29238

CODESYS Automation Server before 1.16.0 allows cross-site request forgery (CSRF).

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-05-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.0th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Codesys Automation Server

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

customers.codesys.com/index.php (Permissions Required, Vendor Advisory)
www.codesys.com/security/security-reports.html (Vendor Advisory)
customers.codesys.com/index.php (Vendor Advisory)

Frequently asked questions

What is CVE-2021-29238?: CVE-2021-29238 is a high-severity vulnerability in Codesys Automation Server, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-05-03.
How severe is CVE-2021-29238?: High severity. CVSS v3 base score is 8.8 out of 10.