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CVE Record

CVE-2016-11066: An issue was discovered in Mattermost Server before 3.2.0.

An issue was discovered in Mattermost Server before 3.2.0. The initial_load API disclosed unnecessary personal information.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Mattermost Server versions before 3.2.0 had an API that exposed more personal information than necessary. The public record is sparse, so the business concern is privacy exposure from legacy Mattermost deployments rather than confirmed system takeover.

Executive priority

Prioritize as a legacy privacy-risk cleanup. Escalate if the organization still runs Mattermost before 3.2.0, especially where personal information exposure has regulatory or contractual impact.

Technical view

CVE-2016-11066 describes unnecessary personal information disclosure through the initial_load API in Mattermost Server before 3.2.0. The sources provide no CVSS score, CWE, exposed field list, authentication requirement, or detailed remediation notes.

Likely exposure

Any environment still running Mattermost Server before 3.2.0 may be exposed. The source bundle does not identify specific editions, deployment types, configurations, or vulnerable personal-data fields.

Exploitation context

The source bundle does not report active exploitation, and CISA KEV status is false. No public exploit status is cited in the provided sources.

Researcher notes

Evidence is incomplete. The CVE confirms the affected version boundary and API area, but not exploit prerequisites, data fields, severity metrics, or fixed-code details.

Mitigation direction

  • Inventory Mattermost Server versions across all environments.
  • Upgrade systems running versions before 3.2.0 per vendor guidance.
  • Review Mattermost security updates for any related hardening notes.
  • Limit access to legacy Mattermost instances until upgraded.

Validation and detection

  • Confirm deployed Mattermost Server version is 3.2.0 or later.
  • Check whether any legacy instance still exposes the initial_load API.
  • Review logs for unusual access to initial_load endpoints.
  • Assess whether personal information was unnecessarily accessible before upgrade.
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.

ATT&CK lookup starting points

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CVE-2016-11066 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.