VDB-292095 · CVE-2025-0476 · GCVE-0-2025-0476

Mattermost Mobile Apps up to 2.22.0 Attachment Name improper validation of specified type of input

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.
4.2	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Mattermost Mobile Apps up to 2.22.0. Affected by this issue is some unknown functionality of the component Attachment Name Handler. Performing a manipulation results in improper validation of specified type of input. This vulnerability is known as CVE-2025-0476. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Mattermost Mobile Apps up to 2.22.0. This affects some unknown processing of the component Attachment Name Handler. The manipulation with an unknown input leads to a improper validation of specified type of input vulnerability. CWE is classifying the issue as CWE-1287. The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type. This is going to have an impact on availability. The summary by CVE is:

Mattermost Mobile Apps versions <=2.22.0 fail to properly handle specially crafted attachment names, which allows an attacker to crash the mobile app for any user who opened a channel containing the specially crafted attachment

The weakness was published by Lsibilev. It is possible to read the advisory at mattermost.com. This vulnerability is uniquely identified as CVE-2025-0476 since 01/14/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2.23.0 eliminates this vulnerability.

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

Productinfo

Type

Groupware Software

Vendor

Mattermost

Name

Mobile Apps

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CNA Base Score: 4.3
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: Improper validation of specified type of input
CWE: CWE-1287 / CWE-20
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: Mobile Apps 2.23.0

Timelineinfo

01/14/2025 🔍
01/16/2025 +2 days 🔍
01/16/2025 +0 days 🔍
09/24/2025 +251 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: Lsibilev
Status: Confirmed

CVE: CVE-2025-0476 (🔍)
GCVE (CVE): GCVE-0-2025-0476
GCVE (VulDB): GCVE-100-292095

Entryinfo

Created: 01/16/2025 07:18
Updated: 09/24/2025 18:56
Changes: 01/16/2025 07:18 (65), 01/16/2025 12:15 (1), 09/24/2025 18:56 (9)
Complete: 🔍
Cache ID: 216::103