Security readout for executives and security teams
Plain-English summary
Nagios XI versions before 5.8.5 contain an open redirect issue that could help an attacker make a malicious link appear more trustworthy. The main business risk is phishing or spoofing against users who administer or access Nagios XI, not direct system takeover based on the provided sources.
Executive priority
Treat this as a targeted phishing and trust-abuse risk. Prioritize upgrade if Nagios XI is externally reachable or used by privileged administrators.
Technical view
CVE-2021-37352 is an open redirect vulnerability in Nagios XI before 5.8.5. The CVE description says exploitation requires convincing a user to click a crafted link. The provided sources do not include CVSS, CWE, detailed affected build ranges beyond before 5.8.5, or confirmed exploitation evidence.
Likely exposure
Exposure is most relevant where Nagios XI is deployed and reachable by users, especially externally accessible or broadly accessible monitoring portals running versions before 5.8.5.
Exploitation context
The provided CVE record describes user interaction through a crafted link. CISA KEV status is false in the bundle, and no cited source states active exploitation.
Researcher notes
Evidence is limited to the CVE description and Nagios changelog reference. There is no CVSS vector, CWE, detailed endpoint information, proof-of-concept status, or vendor mitigation detail in the supplied bundle.
Mitigation direction
- Upgrade Nagios XI deployments to version 5.8.5 or later.
- Review Nagios vendor changelog and advisories for related release guidance.
- Limit Nagios XI portal access to trusted networks or VPN where practical.
- Train administrators to treat unexpected Nagios XI links as phishing risks.
Validation and detection
- Inventory all Nagios XI instances and record their installed versions.
- Confirm no production instance is running a version before 5.8.5.
- Check whether any Nagios XI portals are internet-accessible.
- Review access logs for suspicious link-driven administrator sessions, if logs are available.
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-2021-37352 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_MISC
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.