Cloudanix VulnDB

CVE-2026-53521

Medium · 6.4

CVSS

6.4

EPSS

0.3%

Published

Jun 12, 2026

CISA due date

—

The record

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, PATCH /server/{id} accepts and persists nonexistent ddns_profiles IDs for a member-owned server. If another user later creates a DDNS profile with one of those IDs, the DDNS worker resolves the stored ID and dispatches an update using the other user's DDNS profile configuration in the context of the attacker's server. This issue has been patched in version 2.1.0.

Affected packages

Ecosystem Package Introduced Fixed

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