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CVE-2026-24692

Guest users can bypass read permissions via search API

Published: Mar 16, 2026Updated: Mar 18, 2026 Sources: CVE List NVD BDUCWE-863
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.2%
Top 94.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly enforce read permissions in search API endpoints which allows guest users without read permissions to access posts and files in channels via search API requests. Mattermost Advisory ID: MMSA-2025-00554

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-863

Affected Products

mattermost servermattermost
On-premWeb App
Communications / messaging-chat
MattermostMattermost Inc
On-premWeb App
Communications / messaging-chat
MattermostMattermost
On-premWeb App
Communications / messaging-chat
mattermostcommercialUSCommunications
mattermost inccommercialUSCommunicationsaka mattermost

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://mattermost.com/security-updates
mattermost.com

Timeline

Published
Mar 16, 2026
Last Updated
Mar 18, 2026

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