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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

PUBLISHED Reserved 2025-08-15 | Published 2025-09-15 | Updated 2025-09-15 | Assigner Mattermost




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

Problem types

CWE‑601: URL Redirection to Untrusted Site (“Open Redirect”)

Product status

Default status
unaffected

10.5.0 (semver)
affected

10.11.0
unaffected

10.5.10
unaffected

Credits

Juho Forsén finder

References

mattermost.com/security-updates

cve.org (CVE-2025-9084)

nvd.nist.gov (CVE-2025-9084)

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