CVE-2025-31363

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 upstreamwhich allows an authenticated user toexfiltrate data from an arbitrary server accessible to the victim via performing a prompt injectionin the AI plugin's Jira tool.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
3 LOW
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N
MattermostCNA
3 LOW
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N
CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 5%
VendorProductVersion
mattermostmattermost_server
9.11.0 ≤
𝑥
< 9.11.10
mattermostmattermost_server
10.4.0 ≤
𝑥
< 10.4.3
mattermostmattermost_server
10.5.0
𝑥
= Vulnerable software versions
References
https://mattermost.com/security-updates