How severe is CVE-2021-29238?

CVE-2021-29238 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-29238 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29238?

CVE-2021-29238 affects Codesys Automation Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29238?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-29238 published?

CVE-2021-29238 was published on 2021-05-03 and last updated on 2026-06-17.

CVE-2021-29238

CVE-2021-29238 is a high-severity vulnerability in Codesys Automation Server with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Codesys Automation Server
Published: 2021-05-03
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-29238?: CODESYS Automation Server before 1.16.0 allows cross-site request forgery (CSRF).
How severe is CVE-2021-29238?: CVE-2021-29238 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-29238 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29238?: CVE-2021-29238 affects Codesys Automation Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29238?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-29238 published?: CVE-2021-29238 was published on 2021-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:codesys:automation_server:*:*:*:*:*:*:*:*

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