CVE-2025-9078 - CVE House
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Status published Medium CVE-2025-9078

Weak cache keys lead to post IDOR and link preview poisoning

Vulnerability Description

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • daw10

References

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Affected Vendor

Affected Software

Mattermost
Vulnerable Versions:
10.8.0, 10.5.0, 9.11.0, 10.10.0, 10.9.0, 10.11.0, 10.8.4, 10.5.9, 9.11.18, 10.10.2, 10.9.4

Timeline

Official Publish: September 15th, 2025
Last Modified: September 15th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weaknesses (CWE)

CWE-328

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.