VDB-332813 · CVE-2025-55074 · EUVD-2025-198045

Mattermost up to 10.5.11/10.11.3 Agents Plugin information disclosure

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.
3.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Mattermost up to 10.5.11/10.11.3. It has been classified as problematic. This affects an unknown function of the component Agents Plugin. The manipulation leads to information disclosure. This vulnerability is listed as CVE-2025-55074. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Mattermost up to 10.5.11/10.11.3. This issue affects an unknown code block of the component Agents Plugin. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects

The weakness was presented by Juho Forsén. The advisory is shared at mattermost.com. The identification of this vulnerability is CVE-2025-55074 since 10/15/2025. The exploitation is known to be difficult. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 10.5.12, 10.11.4 or 11.0.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-198045) and CERT Bund (WID-SEC-2025-2315). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Mattermost Mattermost

Productinfo

Type

Groupware Software

Name

Mattermost

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.2
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 3.5
NVD Vector: 🔒

CNA Base Score: 3.0
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost 10.5.12/10.11.4/11.0.0

Timelineinfo

10/15/2025 CVE reserved
11/18/2025 +34 days Advisory disclosed
11/18/2025 +0 days VulDB entry created
11/28/2025 +10 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Juho Forsén
Status: Confirmed

CVE: CVE-2025-55074 (🔒)
GCVE (CVE): GCVE-0-2025-55074
GCVE (VulDB): GCVE-100-332813
EUVD: 🔒
CERT Bund: WID-SEC-2025-2315 - Mattermost Server und Mobile: Mehrere Schwachstellen

Entryinfo

Created: 11/18/2025 20:07
Updated: 11/28/2025 16:14
Changes: 11/18/2025 20:07 (65), 11/19/2025 08:31 (7), 11/27/2025 08:28 (11), 11/28/2025 02:20 (1), 11/28/2025 16:14 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.