Is CVE-2021-33845 being actively exploited?

CVE-2021-33845 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2021-33845?

CVE-2021-33845 has a CVSS 3.1 base score of 5.3 (MEDIUM).

CVE-2021-33845

MEDIUM · CVSS 5.3EPSS 0.9%EU EUVD

The Splunk Enterprise REST API allows enumeration of usernames via the lockout error message. The potential vulnerability impacts Splunk Enterprise instances before 8.1.7 when configured to repress verbose login errors.

Key facts

CVSS score: 5.3 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-203
EPSS score: 0.9% (59th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2021-20519)
Published: May 6, 2022
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-20519 in the EU Vulnerability Database. Last updated in EUVD on August 4, 2024.

View on the EU Vulnerability Database

Affected products

splunk / splunk

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Splunk Enterprise 8.1 - Splunk, Inc. - Common Criteria CCEVS-VR-VID-11108-2021 - archived

References

https://research.splunk.com/application/splunk_user_enumeration_attempt/(Vendor Advisory)
https://www.splunk.com/en_us/product-security/announcements/svd-2022-0502.html(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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