Mattermost Open Redirect vulnerability in github.com/mattermost/mattermost-server
Mattermost Open Redirect vulnerability in github.com/mattermost/mattermost-server
02 / AFFECTED SOFTWARE
Affected packages
51 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Mattermost versions 10.10.x <= 10.10.1, 10.5.x <= 10.5.9, 10.9.x <= 10.9.4 fail to validate the redirect_to parameter, allowing an attacker to craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL.
Mattermost Open Redirect vulnerability in github.com/mattermost/mattermost-server
Mattermost versions 10.10.x <= 10.10.1, 10.5.x <= 10.5.9, 10.9.x <= 10.9.4 fail to validate the redirect_to parameter, allowing an attacker to craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL.
05 / REFERENCES
Further evidence
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9072.json
- https://mattermost.com/security-updates
- https://nvd.nist.gov/vuln/detail/CVE-2025-9072
- https://github.com/advisories/GHSA-69j8-prx2-vx98
- https://github.com/mattermost/mattermost/commit/13cd76009d31754db46115bddef5287a8a29871a
- https://github.com/mattermost/mattermost/commit/9eebaadf8f720788e99b6997337c8df330271326
- https://github.com/mattermost/mattermost/commit/fda403fb6ec41bea8780bff198a26860f105e6e5
- https://github.com/mattermost/mattermost