CVE-2026-53521

MEDIUM EPSS 13.4%

Published Jun 12, 20263w ago · Modified Jun 17, 20262w ago

6.4 CVSS 3.1

Medium

Published Jun 12, 2026 3w ago

Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score

6.4

Exploitability

3.1

Impact

2.7

Vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Changed

Confidentiality None

Integrity Low

Availability Low

Threat Intelligence

EPSS Exploit Probability

13.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

References 1

github.com https://github.com/nezhahq/nezha/security/advisories/GHSA-39g2-8x68-pmx8

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.