CVE-2026-53521 — Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context
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 persi…
Published: 2026-06-12 · CVSS: 6.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7