Vulnerability · Published Sep 15, 2025 · Assigned by Mattermost
CVE-2025-9084Open redirect in OAuth login
Low 3.1
In plain English
A low-severity open redirect 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 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.1Low
Exploit odds (30 days)0.2%top 93.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Mattermost versions 10.5.x <= 10.5.9 fail to properly validate redirect URLs which allows attackers to redirect users to malicious sites via crafted OAuth login URLs
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 10.5.10 | GHSA-hm95-jx66-g2gh |
| Go | github.com/mattermost/mattermost-server | 10.5.10+incompatible | GO-2025-3960 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3960 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3960 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-202508080704-39bd251fe4f600 | GHSA-hm95-jx66-g2gh |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GO-2025-3960 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.5.0 – through 10.5.9 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N