Mattermost up to 9.11.5/10.0.3/10.1.3 improper validation of specified type of input

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Mattermost up to 9.11.5/10.0.3/10.1.3. This vulnerability affects unknown code. This manipulation causes improper validation of specified type of input. The identification of this vulnerability is CVE-2025-20088. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Mattermost up to 9.11.5/10.0.3/10.1.3 and classified as problematic. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a improper validation of specified type of input vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.

The weakness was shared by C0rydoras. The advisory is shared at mattermost.com. This vulnerability is known as CVE-2025-20088 since 01/14/2025. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 214906 (SUSE SLES15 / openSUSE 15 Security Update : govulncheck-vulndb (SUSE-SU-2025:0297-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.11.6, 10.0.4, 10.1.4, 10.2.1 or 10.3.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (214906). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

CNA Base Score: 6.5
CNA Vector (Mattermost): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Nessus ID: 214906
Nessus Name: SUSE SLES15 / openSUSE 15 Security Update : govulncheck-vulndb (SUSE-SU-2025:0297-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost 9.11.6/10.0.4/10.1.4/10.2.1/10.3.0

Timelineinfo

01/14/2025 🔍
01/15/2025 +1 days 🔍
01/15/2025 +0 days 🔍
02/04/2025 +20 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: C0rydoras
Status: Confirmed

CVE: CVE-2025-20088 (🔍)
GCVE (CVE): GCVE-0-2025-20088
GCVE (VulDB): GCVE-100-292009

Entryinfo

Created: 01/15/2025 18:11
Updated: 02/04/2025 07:07
Changes: 01/15/2025 18:11 (63), 02/04/2025 07:07 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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