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CVE-2026-53521

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:08a2f4533c280e9b93854fd08e3c96fbfb6d5de86ff1290c1be8df5ceca33e6f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"nezha","vendor":"nezhahq","versions":[{"status":"affected","version":">= 2.0.14, < 2.1.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e9660133af2bb9f6929d64d83e44fca23924020e7d2ce5efa56db51e3740c3be · sha256:5722469e10575d01… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e9660133af2bb9f6929d64d83e44fca23924020e7d2ce5efa56db51e3740c3be · sha256:5722469e10575d01… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e9660133af2bb9f6929d64d83e44fca23924020e7d2ce5efa56db51e3740c3be · sha256:5722469e10575d01… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/nezhahq/nezha/security/advisories/GHSA-39g2-8x68-pmx8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-39g2-8x68-pmx8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e9660133af2bb9f6929d64d83e44fca23924020e7d2ce5efa56db51e3740c3be · sha256:5722469e10575d01… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-39g2-8x68-pmx8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e9660133af2bb9f6929d64d83e44fca23924020e7d2ce5efa56db51e3740c3be · sha256:5722469e10575d01… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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