What’s Vulnerable › Vulnerabilities

CVE-2023-22359: User-enumeration in RestAPI

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-26 · updated 2026-06-17
• Weakness: CWE-203

Description

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Affected products

• Checkmk GmbH Checkmk: 2.2.0, 2.2.0-b1, 2.2.0-b2, 2.2.0-b3, 2.2.0-b4, 2.2.0-b5 (+8)

References

• https://checkmk.com/werk/15890
• https://checkmk.com/werk/15890

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