Security readout for executives and security teams
Plain-English summary
Mattermost team members could access sensitive information about other users through direct API access in version 6.7.0 and earlier. This is not a system takeover issue, but it can expose user data at scale inside collaboration environments where many people have accounts.
Executive priority
Treat this as a moderate confidentiality risk. Prioritize remediation where Mattermost contains sensitive identities, customer collaboration, regulated user data, or broad external access. It is less urgent than remote code execution, but user-data exposure can still create privacy, trust, and account-targeting risk.
Technical view
CVE-2022-2401 is a CWE-200 information disclosure flaw in Mattermost. The published description says unrestricted information disclosure allowed authenticated team members to access some sensitive information for all users through APIs. CVSS 3.1 is 6.5, with network access, low complexity, low privileges, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is most likely in Mattermost deployments running version 6.7.0 or earlier, especially where ordinary team members or external collaborators have accounts. The provided sources do not identify affected configurations beyond version scope.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires a valid team-member account and API reachability, so insider, compromised-account, or overbroad-guest-access scenarios are the practical concern.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, affected Mattermost versions, CWE-200 classification, and Mattermost security-updates reference. The provided bundle does not name a fixed version, specific exposed fields, proof of exploitation, or technical request details.
Mitigation direction
- Identify all Mattermost instances and their exact versions.
- Check Mattermost security updates for the vendor-designated fixed release.
- Upgrade affected instances according to vendor guidance.
- Reduce unnecessary team membership and guest access.
- Review whether exposed user fields can be restricted by configuration.
Validation and detection
- Inventory Mattermost servers and confirm version numbers.
- Flag any instance running 6.7.0 or earlier as potentially affected.
- Review non-administrator accounts with team membership.
- Check logs for unusual user-profile or user-list API access.
- Confirm remediation against Mattermost security guidance.
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.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-2401 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://mattermost.com/security-updates/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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.