CVE-2025-52931 | BDVDB-2026-289063 Detail

MattermostMattermost Confluence Plugin

Description#

Mattermost Confluence Plugin version <1.5.0 fails to handle unexpected request body which allows attackers to crash the plugin via constant hit to update channel subscription endpoint with an invalid request body.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-754 Improper Check for Unusual or Exceptional Conditions

References#

https://mattermost.com/security-updates

Exploit#

No public exploit known

History#

Version 12025-08-11Record published in the CVE List.

Published

Published: 2025-08-11
Last modified: 2025-08-11

Vendor information

Vendor: Mattermost
Product: Mattermost Confluence Plugin

All Mattermost vulnerabilities

Score

7.5 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 30.9.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 1.5.0
Fixed
1.5.0
Vulnerable
Not stated
Fixed
1.5.0

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.5 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).