CVE-2021-33845— Username enumeration through lockout message in REST API
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I. Basic Information for CVE-2021-33845
Vulnerability Information
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Vulnerability Title
Username enumeration through lockout message in REST API
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过差异性导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Splunk Enterprise 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk是美国Splunk公司的一套数据收集分析软件。该软件主要用于收集、索引和分析及其所产生的数据，包括所有IT系统和基础结构（物理、虚拟机和云）生成的数据。 Splunk Enterprise 8.1.7 之前版本存在安全漏洞，攻击者利用该漏洞可枚举用户名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Splunk | Splunk Enterprise | Version(s) before 8.1.7 | - |
II. Public POCs for CVE-2021-33845
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Splunk · 2022-05-06 · 7 CVEs total
| CVE-2021-42743 | 8.8 HIGH | Local privilege escalation via a default path in Splunk Enterprise Windows |
| CVE-2022-26889 | 8.8 HIGH | Path Traversal in search parameter results in external content injection |
| CVE-2022-27183 | 8.8 HIGH | Reflected XSS in a query parameter of the Monitoring Console |
| CVE-2021-26253 | 8.1 HIGH | Bypass of Splunk Enterprise's implementation of DUO MFA |
| CVE-2021-31559 | 7.5 HIGH | S2S TcpToken authentication bypass |
| CVE-2022-26070 | 4.3 MEDIUM | Error message discloses internal path |
IV. Related Vulnerabilities
Same product: Splunk Enterprise
- CVE-2026-20203
Improper Access Control in Data Model Acceleration in Splunk - CVE-2026-20204
Improper Handling and Insufficient Isolation of Specific Tem - CVE-2026-20202
Improper Input Validation during User Account Creation in Sp - CVE-2026-20163
Remote Command Execution (RCE) through the '/splunkd/__uploa - CVE-2026-20162
Stored Cross-Site Scripting (XSS) through Path Traversal in
Same vendor: Splunk
- CVE-2026-20205
Sensitive Information Disclosure in ''_internal'' index in S - CVE-2026-20203
Improper Access Control in Data Model Acceleration in Splunk - CVE-2026-20204
Improper Handling and Insufficient Isolation of Specific Tem - CVE-2026-20202
Improper Input Validation during User Account Creation in Sp - CVE-2026-20163
Remote Command Execution (RCE) through the '/splunkd/__uploa
Same weakness: CWE-203
- CVE-2026-44263
Weblate: Private Translation Enumeration via Screenshot API - CVE-2023-5872
Wago: Vulnerability in Smart Designer Web-Application - CVE-2026-33429
Parse Server: Protected field change detection oracle via Li - CVE-2026-33425
Discourse has inferable private group membership or existenc - CVE-2026-3580
Compiler-induced timing leak in sp_256_get_entry_256_9 on RI
V. Comments for CVE-2021-33845
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