SecuriTricks - CVE-2025-27936

Description

Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.

Product(s) Impacted

Vendor	Product	Versions
Mattermost	Mattermost Teams Plugin Mattermost Server	<2.1.0 10.5.0-10.5.1

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-208

Observable Timing Discrepancy

Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.

*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_teams_plugin	<2.1.0	/	/	/	/	/	/	/
a	mattermost	mattermost_server	10.5.0-10.5.1	/	/	/	/	/	/	/

References

https://mattermost.com/security-updates

CVSS Score

5.3 / 10

CVSS Data - 3.1

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

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

View Vector String

Timeline

Published: April 16, 2025, 10:15 a.m.
Last Modified: April 16, 2025, 1:25 p.m.

Status : Awaiting Analysis

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

More info

Source

responsibledisclosure@mattermost.com

CVE-2025-27936