6.5

CVE-2025-31363: mattermost

CVSS: 6.5v3.1MediumAnalyzed
AliasesGHSA-9h6j-4ffx-cm84GO-2025-3622CGA-h283-c2qw-3778
Published 16-04-2025Last modified 16-04-2025
Open JSON

Vulnerability summary

CVE-2025-31363 is a medium (CVSS 6.5) vulnerability in mattermost. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.2% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 2
OPENSUSE-SU-2025:15017-1CGA-RWM6-6RP6-X58X

Timeline

  1. 16-04-2025
    PublishedVulnerability first disclosed.
  2. 16-04-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

+0.01 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • mattermost-fips-10.5All versions (No fix recorded)
  • mattermost-fips-10.5-compatAll versions (No fix recorded)
Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
  • mattermost≥ 10.4.0, ≤ 10.4.2 | 10.5.0 | ≥ 9.11.0, ≤ 9.11.9
  • mattermost_serverEOL≥ 9.11.0, < 9.11.10 | ≥ 10.4.0, < 10.4.3 | 10.5.0
Github.com/mattermost1 product
  • mattermost-server≥ 10.5.0+incompatible, < 10.5.1+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8≥ 10.5.0, < 10.5.1 | ≥ 10.4.0, < 10.4.3 | ≥ 9.11.0, < 9.11.10 | < 8.0.0-20250218121836-2b5275d87136

5 vendors · 8 products

References

6 links