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CVE-2025-1792VulnerabilityPublished

CVE-2025-1792: Mattermost · Incorrect Authorization

Affects MattermostSource CVE Database V5

0

Not known to be exploited · CVSS 3.1 Low.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score
3.1Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 May 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Affected software

ProductAffectedFixed in
Mattermost MattermostAffected
  • =10.7.0
  • =10.5.0
  • =9.11.0
Fixed in–

AI-suggested

European organizations should promptly assess their Mattermost deployments to identify if they are running affected versions (10.7.0, 10.5.0, 9.11.0). Until official patches are released, organizations can mitigate risk by restricting guest user access to public channels or disabling guest accounts where feasible. Implementing network-level controls to limit guest user API access can also reduce exposure. Administrators should review channel membership and metadata visibility settings to ensure minimal information is exposed to guest users. Monitoring API access logs for unusual guest user activity targeting channel member endpoints can help detect exploitation attempts. Additionally, organizations should plan to upgrade Mattermost to the latest secure versions once patches become available. Incorporating strict role-based access controls and periodic audits of user permissions will further reduce the risk of similar authorization flaws.

Description

Mattermost versions 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to properly enforce access controls for guest users accessing channel member information, allowing authenticated guest users to view metadata about members of public channels via the channel members API endpoint.

References

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