GHSA-39G2-8X68-PMX8 Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context

Summary PATCH /server/id accepts and persists nonexistent ddnsprofiles 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 contex...

Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context

Summary PATCH /server/id accepts and persists nonexistent ddnsprofiles 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 contex...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the PATCH /server/id process. An attacker can gain unauthorized access to another user's DDNS profile context by storing a nonexistent ddnsprofiles ID for a server they own, which is later resolved if another...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the PATCH /server/id process. An attacker can gain unauthorized access to another user's DDNS profile context by storing a nonexistent ddnsprofiles ID for a server they own, which is later resolved if another...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the DDNS webhook configuration process. An attacker can cause the dashboard host to issue HTTP requests to internal or loopback network services by configuring arbitrary webhookurl, HTTP method,...

CVE-2026-53521

CVE-2026-53521 affects Nezha Monitoring. From versions 2.0.14 up to before 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 dispatc...

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 persists nonexistent ddnsprofiles IDs for a member-owned server. If another user later creates a DDNS profile with one of those...

PT-2026-45048

Name of the Vulnerable Software and Affected Versions Nezha Monitoring versions 0.20.0 through 2.0.9 Description An authenticated user with low privileges can perform a blind Server-Side Request Forgery SSRF by creating or updating a DDNS profile. By configuring a provider webhook with an arbitra...