CVE-2025-31363 is a medium-severity vulnerability affecting Mattermost versions 10.4.x up to 10.4.2, 10.5.x up to 10.5.0, and 9.11.x up to 9.11.9. It allows an authenticated user to exfiltrate data from an arbitrary server accessible to the victim through prompt injection in the AI plugin's Jira tool, due to insufficient restrictions on domains the Large Language Model (LLM) can contact. The CVSS score is 6.5, indicating a network-based attack with low privileges and high confidentiality impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 9.11.0, < 9.11.10CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
>= 10.4.0, < 10.4.3CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
10.5.0CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:10.5.0:-:*:*:*:*:*:* | ||
>= 10.4.0, <= 10.4.2CPE match | cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:* | ||
>= 9.11.0, <= 9.11.9CPE match | cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N
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The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.