Security readout for executives and security teams
Plain-English summary
Nagios XI versions before 5.8.5 had an incorrect permission assignment on the repairmysql.sh maintenance script. The public record does not explain the practical impact, but permission mistakes in administrative scripts can create avoidable operational security risk. Organizations running older Nagios XI should prioritize version verification and vendor-guided remediation.
Executive priority
Handle during the next Nagios XI maintenance window unless local exposure or privileged multi-user host access raises risk. There is no cited evidence of active exploitation, but the fix boundary is clear.
Technical view
CVE-2021-36365 concerns incorrect permissions for repairmysql.sh in Nagios XI before 5.8.5. The source bundle provides no CVSS score, CWE, detailed attack preconditions, or impact statement. Treat exposure as version-based until vendor documentation or local file/package comparison clarifies the permission delta.
Likely exposure
Exposure is likely limited to Nagios XI installations running versions earlier than 5.8.5. The provided affected metadata is generic, but the CVE description identifies Nagios XI and the version boundary.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, public exploit status, or weaponized details. Evidence is insufficient to claim exploitation in the wild.
Researcher notes
The record is sparse: no CVSS, CWE, impact details, or exploitability conditions are provided. The strongest source-grounded facts are product, affected version range, and the repairmysql.sh permission issue. Validate by package comparison, not assumptions.
Mitigation direction
- Inventory all Nagios XI instances and record exact versions.
- Upgrade Nagios XI versions before 5.8.5 to 5.8.5 or later.
- Review Nagios vendor changelog and CHANGES notes for release-specific guidance.
- Restrict administrative shell access to Nagios XI hosts.
- Monitor Nagios advisories for any updated remediation details.
Validation and detection
- Confirm each Nagios XI instance reports version 5.8.5 or later.
- Compare repairmysql.sh ownership and permissions against the fixed vendor package.
- Review configuration management records for unauthorized permission drift.
- Check vulnerability scanners for CVE-2021-36365 coverage and version logic.
- Recheck KEV and vendor advisories before setting final deadlines.
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-2021-36365 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.