Mattermost up to 9.11.6/10.4.1 session fixiation

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Mattermost up to 9.11.6/10.4.1. It has been classified as critical. This affects an unknown function. This manipulation causes session fixiation. This vulnerability appears as CVE-2025-1412. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Mattermost up to 9.11.6/10.4.1. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a session fixiation vulnerability. The CWE definition for the vulnerability is CWE-384. Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Mattermost versions 9.11.x <= 9.11.6, 10.4.x <= 10.4.1 fail to invalidate all active sessions when converting a user to a bot, with allows the converted user to escalate their privileges depending on the permissions granted to the bot.

The weakness was presented by eAhmed. It is possible to read the advisory at mattermost.com. This vulnerability is known as CVE-2025-1412 since 02/18/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 216938 (Mattermost Server 9.11.x < 9.11.7 / 10.4.x < 10.4.2 (MMSA-2025-00414)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.11.7, 10.4.2 or 10.5.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (216938). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.1
CNA Vector (Mattermost): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Session fixiation
CWE: CWE-384
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 216938
Nessus Name: Mattermost Server 9.11.x < 9.11.7 / 10.4.x < 10.4.2 (MMSA-2025-00414)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost 9.11.7/10.4.2/10.5.0

Timelineinfo

02/18/2025 🔍
02/24/2025 +6 days 🔍
02/24/2025 +0 days 🔍
02/28/2025 +4 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: eAhmed
Status: Confirmed

CVE: CVE-2025-1412 (🔍)
GCVE (CVE): GCVE-0-2025-1412
GCVE (VulDB): GCVE-100-296623

Entryinfo

Created: 02/24/2025 10:03
Updated: 02/28/2025 20:34
Changes: 02/24/2025 10:03 (64), 02/28/2025 20:34 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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