Mattermost up to 9.11.12/10.5.3/10.6.2/10.7.0 Google OAuth Signup incorrect implementation of authentication algorithm

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Mattermost up to 9.11.12/10.5.3/10.6.2/10.7.0. This vulnerability affects unknown code of the component Google OAuth Signup. The manipulation results in incorrect implementation of authentication algorithm. This vulnerability was named CVE-2025-2571. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Mattermost up to 9.11.12/10.5.3/10.6.2/10.7.0. Affected is an unknown part of the component Google OAuth Signup. The manipulation with an unknown input leads to a incorrect implementation of authentication algorithm vulnerability. CWE is classifying the issue as CWE-303. The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to clear Google OAuth credentials when converting user accounts to bot accounts, allowing attackers to gain unauthorized access to bot accounts via the Google OAuth signup flow.

The weakness was presented by eAhmed. The advisory is available at mattermost.com. This vulnerability is traded as CVE-2025-2571 since 03/20/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 237904 (Mattermost Server 9.11.x < 9.11.13 / 10.5.x < 10.5.4 / 10.6.x < 10.6.3 / 10.7.1 Multiple Vulnerabilities (MMSA-2025-00458, MMSA-2025-00463, MMSA-2025-00467)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.11.13, 10.5.4, 10.6.3, 10.7.1 or 10.8.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (237904). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Groupware Software

Name

• Mattermost

Version

• 9.11.0
• 9.11.1
• 9.11.2
• 9.11.3
• 9.11.4
• 9.11.5
• 9.11.6
• 9.11.7
• 9.11.8
• 9.11.9
• 9.11.10
• 9.11.11
• 9.11.12
• 10.0
• 10.1
• 10.2
• 10.3
• 10.4
• 10.5
• 10.5.0
• 10.5.1
• 10.5.2
• 10.5.3
• 10.6
• 10.6.0
• 10.6.1
• 10.6.2
• 10.7.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.5

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.2
CNA Vector (Mattermost): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Incorrect implementation of authentication algorithm
CWE: CWE-303
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 237904
Nessus Name: Mattermost Server 9.11.x < 9.11.13 / 10.5.x < 10.5.4 / 10.6.x < 10.6.3 / 10.7.1 Multiple Vulnerabilities (MMSA-2025-00458, MMSA-2025-00463, MMSA-2025-00467)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost 9.11.13/10.5.4/10.6.3/10.7.1/10.8.0

Timelineinfo

03/20/2025 🔍
05/30/2025 +70 days 🔍
05/30/2025 +0 days 🔍
06/08/2025 +9 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: eAhmed
Status: Confirmed

CVE: CVE-2025-2571 (🔍)
GCVE (CVE): GCVE-0-2025-2571
GCVE (VulDB): GCVE-100-310698

Entryinfo

Created: 05/30/2025 18:00
Updated: 06/08/2025 08:56
Changes: 05/30/2025 18:00 (64), 06/08/2025 08:56 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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