CVE Tools
Sign in

CVE-2025-8285

Unauthorized Channel Subscription Creation in Mattermost Confluence Plugin

Published: Aug 11, 2025Updated: Sep 24, 2025 Sources: CVE List NVD GHSA BDUCWE-862
NVD MITRE
4.0CVSSMEDIUM
EPSS Score
0.2%
Top 92.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to create channel subscription without proper access to the channel via API call to the create channel subscription endpoint.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:CC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-862

Affected Products

confluencemattermost
On-prem
Communications / messaging-chat
Mattermost Confluence PluginMattermost
On-prem
Communications / messaging-chat
Mattermost ConfluenceMattermost Inc
SaaS
Communications / messaging-chat
github.com/mattermost/mattermost-plugin-confluenceGoOSS Libraries
mattermostcommercialUSCommunications
mattermost inccommercialUSCommunicationsaka mattermost
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://mattermost.com/security-updates
mattermost.com
https://osv.dev/vulnerability/GHSA-qjrx-j8wm-xf83&#13;
osv.dev
https://github.com/mattermost/mattermost-plugin-confluence&#13;
github.com
and 4 more references View all →

Timeline

Published
Aug 11, 2025
Last Updated
Sep 24, 2025

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-8285 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows