SecuriTricks - CVE-2025-6226

Description

Mattermost versions 10.5.x <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allows an authenticated user to read posts in private channels they don't have access to via guessing the PendingPostID of recently created posts.

Product(s) Impacted

Vendor	Product	Versions
Mattermost	Mattermost	10.5.0-10.5.6, 10.7.0-10.7.3, 10.8.0-10.8.1, 9.11.0-9.11.16

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-306

Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mattermost	mattermost	10.5.0-10.5.6	/	/	/	/	/	/	/
a	mattermost	mattermost	10.7.0-10.7.3	/	/	/	/	/	/	/
a	mattermost	mattermost	10.8.0-10.8.1	/	/	/	/	/	/	/
a	mattermost	mattermost	9.11.0-9.11.16	/	/	/	/	/	/	/

References

https://mattermost.com/security-updates

CVSS Score

6.5 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: NONE
Availability Impact: NONE

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

View Vector String

Timeline

Published: July 18, 2025, 9:15 a.m.
Last Modified: July 18, 2025, 9:15 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

responsibledisclosure@mattermost.com

CVE-2025-6226