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Mattermost MobileApplication · Mattermost

CVE-2020-14449

HIGH · 7.5 CVSS v3.1 Published 2020-06-19
Fix available
A fix is available. Upgrade to 1.30.0 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An issue was discovered in Mattermost Mobile Apps before 1.30.0. Authorization tokens can sometimes be disclosed to third-party servers, aka MMSA-2020-0018.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Mattermost Mobile Apps before version 1.30.0 contain a vulnerability where authorization tokens may be inadvertently disclosed to third-party servers during network requests, potentially allowing unauthorized access to user sessions or data.

MitigationUpgrade Mattermost Mobile Apps to version 1.30.0 or later to prevent authorization token disclosure to third-party servers.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Mattermost MobileApplication
Affected:< 1.30.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check Mattermost Mobile app version
    On iOS: Open App Store > Tap profile > Scroll to purchased apps > Find Mattermost. On Android: Open Play Store > Tap profile > Manage apps and games > Find Mattermost. The version number is displayed below the app name.
    Affected if The installed version is below 1.30.0 (for example, 1.29.x, 1.28.x, etc.)
  2. Confirm app is Mattermost Mobile
    Verify the app name is exactly 'Mattermost' (not Mattermost Enterprise or other variants). This CVE specifically affects the Mattermost Mobile application.
    Affected if The app is the Mattermost Mobile app and the version is below 1.30.0
  3. Check for pending updates
    In the app store (Play Store or App Store), search for Mattermost and check if an update is available. An update indicates the installed version may be outdated.
    Affected if An update is available and the current version is below 1.30.0

If the Mattermost Mobile app version installed on the device is any version prior to 1.30.0, the app is vulnerable and may be leaking authorization tokens to third-party servers during network requests.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 1.30.0 or later
Fixed in 1.30.0
Interim mitigation

Upgrade Mattermost Mobile Apps to version 1.30.0 or later to prevent authorization token disclosure to third-party servers.

Fix this in Mattermost Mobile Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $910
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,456.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-14449 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data