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» GHSA-6ff3-jgxh-vffj
Description
Mattermost Confluence Plugin version <1.5.0 fails to check the authorization of the user to the Mattermost instance which allows attackers to create a channel subscription without proper authorization via API call to the create channel subscription endpoint.
Basic information
Type
reviewed
Severity
high Advisory on GitHub
Open advisory ↗ Repository advisory
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Source code
Browse source ↗ Published (advisory)
2025-08-11 21:31:39 UTC
Updated
2025-08-11 23:09:16 UTC
GitHub reviewed
2025-08-11 23:09:14 UTC
NVD published
2025-08-11
EPSS Score
Score
Percentile
0.05%
14.77%
CVSS Scores
Base score
Version
Severity
Vector
7.2
3.1
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
CWEs
CWE id
Name
CWE-306
Missing Authentication for Critical Function
Affected packages (1)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
go
github.com/mattermost/mattermost-plugin-confluence < 1.5.0
1.5.0
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cvelogic
Threat Intelligence