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CVE Record

CVE-2018-6926: In app/Controller/ServersController.php in MISP 2.4.87, a server setting permitted the override of a path v...

In app/Controller/ServersController.php in MISP 2.4.87, a server setting permitted the override of a path variable on certain Red Hed Enterprise Linux and CentOS systems (where rh_shell_fix was enabled), and consequently allowed site admins to inject arbitrary OS commands. The impact is limited by the setting being only accessible to the site administrator.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue affects MISP 2.4.87 in a narrow configuration. A site administrator could change a server setting in a way that lets operating-system commands run on certain Red Hat Enterprise Linux or CentOS hosts with rh_shell_fix enabled. The business risk is mainly from compromised, misused, or overly broad site-admin access.

Executive priority

Treat this as a targeted administrative-control issue, not a broad internet-facing emergency based on available evidence. Prioritize MISP instances that run on RHEL/CentOS, hold sensitive threat-intelligence data, or have many administrators.

Technical view

CVE-2018-6926 is an OS command injection issue in MISP app/Controller/ServersController.php. The CVE description says a server setting could override a path variable on certain RHEL and CentOS systems when rh_shell_fix was enabled. Access is limited to MISP site administrators. No CVSS, CWE, or broad affected-version metadata is provided.

Likely exposure

Exposure appears limited to MISP 2.4.87 deployments on affected RHEL/CentOS configurations where rh_shell_fix is enabled and site-administrator access exists. The provided data does not identify other affected versions or products.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires site-administrator-level access according to the CVE description, so the most relevant threat scenarios are admin credential compromise, insider misuse, or unsafe delegation of MISP site-admin rights.

Researcher notes

Evidence is sparse: the bundle provides the CVE description and a single MISP commit reference, with no CVSS, CWE, KEV status, or affected-version range beyond MISP 2.4.87 in the description. Avoid assuming exploit availability, additional platforms, or exact fixed releases without vendor confirmation.

Mitigation direction

  • Check MISP vendor guidance and upgrade to a release containing the referenced fix.
  • Restrict MISP site-administrator access to trusted, named personnel only.
  • Review whether rh_shell_fix is enabled on RHEL or CentOS deployments.
  • Audit recent MISP server-setting changes and administrator activity.
  • Monitor host logs for unexpected command execution by the MISP service account.

Validation and detection

  • Inventory MISP deployments and identify any running version 2.4.87.
  • Confirm operating system family for each MISP host.
  • Check whether rh_shell_fix is enabled on RHEL or CentOS systems.
  • Review MISP administrative users for unnecessary site-admin privileges.
  • Verify the referenced vendor commit or a later fixed release is present.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

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CVE-2018-6926 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.