Security readout for executives and security teams
Plain-English summary
Nagios XI versions before 5.8.5 had an incorrect permission assignment affecting migrate.php. The public bundle does not explain the exact business impact, required access, or privilege gained. Treat this as an upgrade hygiene issue for any Nagios XI deployment, with urgency depending on exposure of the management interface.
Executive priority
Prioritize remediation for internet-reachable or broadly accessible Nagios XI systems. With no CVSS or exploitation evidence in the supplied sources, urgency should be driven by asset exposure and the role Nagios plays in monitoring operations.
Technical view
CVE-2021-36363 describes incorrect permission assignment for migrate.php in Nagios XI before 5.8.5. The provided sources do not include CVSS, CWE, CPEs, exploit detail, attack prerequisites, or impact scope. The clearest remediation signal is the version boundary: before 5.8.5.
Likely exposure
Exposure is limited to organizations running Nagios XI before 5.8.5. The source bundle does not identify affected operating systems, CPEs, deployment modes, or whether migrate.php must be reachable by unauthenticated users.
Exploitation context
The source bundle does not show active exploitation, public exploit availability, or KEV listing. It also does not describe a weaponized path. Do not assume exploitation in the wild from these sources alone.
Researcher notes
Evidence is sparse. The description identifies product, version boundary, and file, but not threat model, authentication state, impact, or permission target. Further assessment should use vendor advisories or release notes without inferring exploitability beyond the record.
Mitigation direction
- Upgrade Nagios XI to 5.8.5 or a later supported release.
- Review Nagios vendor changelog and release guidance before scheduling remediation.
- Restrict Nagios XI administrative access to trusted users and networks.
- Track this CVE in vulnerability management until affected assets are confirmed remediated.
Validation and detection
- Inventory all Nagios XI instances and record exact versions.
- Confirm no production instance remains below Nagios XI 5.8.5.
- Check migrate.php permissions against the installed vendor package after update.
- Review access controls around Nagios XI management interfaces.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-36363 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.nagios.com/downloads/nagios-xi/change-log/CVE reference · x_refsource_CONFIRM
- https://assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXTCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.