Vulnerability · Published May 15, 2025 · Assigned by Mattermost
CVE-2025-2527Improper access control to group information
Medium 4.3
In plain English
A medium-severity incorrect authorization in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 75.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 10.5.3+incompatible, 9.11.12+incompatible | GO-2025-3691 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3691 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3691 |
| Go | github.com/mattermost/mattermost/server/v8 | 9.11.12 | GHSA-h356-3mfw-x368 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250411064244-844447fbd57c | GHSA-h356-3mfw-x368 |
| Go | github.com/mattermost/mattermost/server/v8 | 10.5.3 | GHSA-h356-3mfw-x368 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250411064244-844447fbd57c | GO-2025-3691 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.5.0 – through 10.5.29.11.0 – through 9.11.11 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N