Security readout for executives and security teams
Plain-English summary
Mattermost Server versions before 3.0.0 exposed unnecessary APIs that let Team Administrators view account details. The disclosed impact is privacy and access-control exposure, not full system compromise. Business urgency depends on whether any legacy Mattermost instance remains in use and how sensitive account details are in that environment.
Executive priority
Prioritize as moderate if legacy Mattermost remains deployed. It is not evidenced as actively exploited, but it can expose account information to privileged team administrators and should be removed from the environment.
Technical view
CVE-2016-11080 concerns superfluous Mattermost Server APIs available before 3.0.0. The CVE description says a Team Administrator could view account details through those APIs. No CVSS, CWE, affected CPE, detailed exploitability, or vendor-specific remediation text is present in the supplied bundle.
Likely exposure
Exposure is likely limited to organizations still running Mattermost Server before 3.0.0. The actor described is a Team Administrator, so risk centers on privileged insiders, compromised admin accounts, or overly broad team-admin assignments.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. It also does not provide public exploit details. Treat this as a legacy access-control/privacy issue requiring inventory confirmation.
Researcher notes
Evidence is sparse: the CVE gives a concise description only, with unknown severity and no CVSS vector. Do not assume remote unauthenticated exploitation. Focus validation on version inventory, Team Administrator role scope, and vendor security-update guidance.
Mitigation direction
- Inventory Mattermost Server deployments and identify versions before 3.0.0.
- Follow Mattermost security update guidance for supported upgrade or remediation direction.
- Reduce unnecessary Team Administrator assignments until affected instances are retired or upgraded.
- Review whether exposed account details trigger privacy, HR, or contractual notification workflows.
Validation and detection
- Confirm every production and internal Mattermost instance version.
- Flag any Mattermost Server deployment older than 3.0.0.
- Review Team Administrator membership for excessive or stale assignments.
- Check retained audit logs for unusual account-detail access, if 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-2016-11080 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://mattermost.com/security-updates/CVE 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.