CVE-2025-31363— Data exfiltration via AI plugin Jira tool
Quick assessment
Affected
Mattermost Mattermost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost 10.4.2及之前版本、10.5.0及之前版本和9.11.9及之前版本存在安全漏洞，该漏洞源于LLM请求域限制不足，可能导致数据泄露。
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I. Basic Information for CVE-2025-31363
Vulnerability Information
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Vulnerability Title
Data exfiltration via AI plugin Jira tool
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1426
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost 10.4.2及之前版本、10.5.0及之前版本和9.11.9及之前版本存在安全漏洞，该漏洞源于LLM请求域限制不足，可能导致数据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mattermost | Mattermost | 10.4.0 ~ 10.4.2 | - |
|
II. Public POCs for CVE-2025-31363
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Mattermost · 2025-04-16 · 6 CVEs total
| CVE-2025-27936 | 5.3 MEDIUM | Webhook Secret Exposure via Timing attack in MSteams plugin |
| CVE-2025-27571 | 4.3 MEDIUM | Channel metadata visible in archived channels despite configuration setting |
| CVE-2025-2564 | 4.3 MEDIUM | Unauthorized View Access to Archived Channel Member Info |
| CVE-2025-24839 | 3.1 LOW | Unauthorized AI bot activation via Wrangler plugin |
| CVE-2025-27538 | 2.2 LOW | MFA Enforcement Bypass Allows Unauthorized Removal of MFA for Other Users |
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Same vendor: Mattermost
-
CVE-2026-18799
Mattermost Server fails to restrict Slack import account bin -
CVE-2026-16251
Mattermost local image proxy allows server memory exhaustion -
CVE-2026-18256
Private team metadata disclosure via the team search API -
CVE-2026-18223
Mattermost invitation tokens not bound to invited email addr -
CVE-2026-19076
Mattermost fails to reject OAuth application sessions in acc
V. Comments for CVE-2025-31363
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