CVE-2025-31363

Summary

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.9 fail to restrict domains the LLM can request to contact upstream which allows an authenticated user to exfiltrate data from an arbitrary server accessible to the victim via performing a prompt injection in the AI plugin's Jira tool.

Affected Software

VendorProductVersion RangeStatus
MattermostMattermost10.4.0 <= 10.4.2affected
MattermostMattermost10.5.0affected
MattermostMattermost9.11.0 <= 9.11.9affected
MattermostMattermost10.6.0unaffected
MattermostMattermost10.4.3unaffected
MattermostMattermost10.5.1unaffected
MattermostMattermost9.11.10unaffected

Weaknesses

  • CWE-1426: CWE-1426: Improper Validation of Generative AI Output

ADP Enrichment

CISA ADP Vulnrichment

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

References