Security readout for executives and security teams
Plain-English summary
Mattermost Server versions before 3.5.1 had a flaw allowing email address verification to be bypassed. This could undermine trust in user identity and email-gated workflows, but the public record provided does not describe full impact, severity, or exploitation.
Executive priority
Treat this as a version-confirmation and cleanup item unless business processes depend heavily on verified email identity. Prioritize unsupported or internet-facing Mattermost instances.
Technical view
CVE-2016-11062 is an email address verification bypass in Mattermost Server before 3.5.1. The CVE bundle provides no CVSS score, CWE, affected CPEs, exploit details, or mitigation text beyond the version boundary and Mattermost security update reference.
Likely exposure
Exposure is likely limited to Mattermost Server deployments running versions before 3.5.1, especially where registration or account trust depends on verified email addresses.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. No public exploit status, attack prerequisites, or exploit mechanics are included in the bundle.
Researcher notes
Evidence is sparse. The record identifies the product and vulnerable version range, but lacks severity scoring, affected CPEs, CWE mapping, patch details, and exploitation evidence.
Mitigation direction
- Identify all Mattermost Server deployments and their exact versions.
- Upgrade any pre-3.5.1 deployment according to Mattermost guidance.
- Review Mattermost security updates for vendor-specific remediation details.
- Reduce reliance on email verification for sensitive authorization decisions until remediated.
Validation and detection
- Confirm production and backup Mattermost instances are not below version 3.5.1.
- Review account onboarding controls that depend on verified email status.
- Check whether public or self-service registration was enabled on affected instances.
- Look for anomalous accounts whose trusted status depends on email verification.
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-2016-11062 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.