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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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Mattermost up to 9.11.5/10.0.3/10.1.3 and classified as problematic. The impacted element is an unknown function. The manipulation results in improper validation of specified type of input. This vulnerability is reported as CVE-2025-20086. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost up to 9.11.5/10.0.3/10.1.3. It has been classified as problematic. Affected is an unknown code. 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. CVE summarizes:

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 disclosed by C0rydoras. The advisory is available at mattermost.com. This vulnerability is traded as CVE-2025-20086 since 01/14/2025. The exploitability is told to be easy. 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 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). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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 🔍
10/01/2025 +258 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: C0rydoras
Status: Confirmed

CVE: CVE-2025-20086 (🔍)
GCVE (CVE): GCVE-0-2025-20086
GCVE (VulDB): GCVE-100-292002

Entryinfo

Created: 01/15/2025 18:09
Updated: 10/01/2025 00:20
Changes: 01/15/2025 18:09 (63), 02/04/2025 07:07 (2), 10/01/2025 00:20 (1)
Complete: 🔍
Cache ID: 216::103

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

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