Mattermost Confluence Plugin up to 1.4.x Create Channel Subscription Endpoint authorization

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

Summaryinfo

A vulnerability classified as problematic has been found in Mattermost Confluence Plugin up to 1.4.x. The affected element is an unknown function of the component Create Channel Subscription Endpoint. Performing a manipulation results in authorization. This vulnerability is cataloged as CVE-2025-8285. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost Confluence Plugin up to 1.4.x. It has been classified as problematic. This affects some unknown processing of the component Create Channel Subscription Endpoint. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity. The summary by CVE is:

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to create channel subscription without proper access to the channel via API call to the create channel subscription endpoint.

The weakness was shared by Lorenzo Gallegos. It is possible to read the advisory at mattermost.com. This vulnerability is uniquely identified as CVE-2025-8285 since 07/28/2025. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.5.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-24169). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CNA Base Score: 4.0
CNA Vector (Mattermost): 🔒

CVSSv2info

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

Exploitinginfo

Class: Authorization
CWE: CWE-862 / CWE-863 / CWE-285
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Confluence Plugin 1.5.0

Timelineinfo

07/28/2025 CVE reserved
08/11/2025 +14 days Advisory disclosed
08/11/2025 +0 days VulDB entry created
09/24/2025 +44 days VulDB entry last update

Sourcesinfo

Advisory: mattermost.com
Researcher: Lorenzo Gallegos
Status: Confirmed

CVE: CVE-2025-8285 (🔒)
GCVE (CVE): GCVE-0-2025-8285
GCVE (VulDB): GCVE-100-319479
EUVD: 🔒

Entryinfo

Created: 08/11/2025 21:58
Updated: 09/24/2025 23:33
Changes: 08/11/2025 21:58 (65), 09/24/2025 08:52 (12), 09/24/2025 23:33 (1)
Complete: 🔍
Cache ID: 216::103

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

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