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» GHSA-h356-3mfw-x368
Description
Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
Basic information
Type
reviewed
Severity
medium Advisory on GitHub
Open advisory ↗ Repository advisory
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Source code
Browse source ↗ Published (advisory)
2025-05-15 18:31:46 UTC
Updated
2025-05-17 14:02:11 UTC
GitHub reviewed
2025-05-17 14:02:10 UTC
NVD published
2025-05-15
EPSS Score
Score
Percentile
0.17%
37.96%
CVSS Scores
Base score
Version
Severity
Vector
4.3
3.1
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CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
CWEs
CWE id
Name
CWE-863
Incorrect Authorization
Affected packages (3)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
go
github.com/mattermost/mattermost/server/v8 >= 10.5.0, <= 10.5.2
10.5.3
—
go
github.com/mattermost/mattermost/server/v8 >= 9.11.0, <= 9.11.11
9.11.12
—
go
github.com/mattermost/mattermost/server/v8 < 8.0.0-20250411064244-844447fbd57c
8.0.0-20250411064244-844447fbd57c
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cvelogic
Threat Intelligence