CVE-2025-9078

Summary

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

Affected Software

VendorProductVersion RangeStatus
MattermostMattermost10.8.0 <= 10.8.3affected
MattermostMattermost10.5.0 <= 10.5.8affected
MattermostMattermost9.11.0 <= 9.11.17affected
MattermostMattermost10.10.0 <= 10.10.1affected
MattermostMattermost10.9.0 <= 10.9.3affected
MattermostMattermost10.11.0unaffected
MattermostMattermost10.8.4unaffected
MattermostMattermost10.5.9unaffected
MattermostMattermost9.11.18unaffected
MattermostMattermost10.10.2unaffected
MattermostMattermost10.9.4unaffected

Weaknesses

  • CWE-328: CWE-328: Use of Weak Hash

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References