CVE-2021-33845

MEDIUMNVD 5.35.3—

5.3

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.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 52.8%
KEV: Not listed

Published

May 6, 2022

Last Modified

November 21, 2024

References (4)

prodsec@splunkhttps://research.splunk.com/application/splunk_user_enumeration_attempt/
prodsec@splunkhttps://www.splunk.com/en_us/product-security/announcements/svd-2022-0502.html
af854a3a-2127-422b-91ae-364da2661108https://research.splunk.com/application/splunk_user_enumeration_attempt/
af854a3a-2127-422b-91ae-364da2661108https://www.splunk.com/en_us/product-security/announcements/svd-2022-0502.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-203Observable Discrepancy (Information Exposure via Side Channel)

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
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2026-05-25 22:39 UTCEG score recompute

Frequently asked(5)

What is CVE-2021-33845?

CVE-2021-33845 is a medium vulnerability published on May 6, 2022. 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.

When was CVE-2021-33845 disclosed?

CVE-2021-33845 was first published in the National Vulnerability Database on May 6, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-33845 actively exploited?

CVE-2021-33845 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

CVE-2021-33845 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2021-33845?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-33845, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2021-33845

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-33845?

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Published

Last Modified

References (4)

Frequently asked(5)

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