Mattermost Confluence Plugin up to 1.4.x API Endpoint GetChannelSubscriptions authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.6$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Mattermost Confluence Plugin up to 1.4.x. This issue affects some unknown processing of the file autocomplete/GetChannelSubscriptions of the component API Endpoint. Such manipulation leads to authorization. This vulnerability is documented as CVE-2025-53857. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Mattermost Confluence Plugin up to 1.4.x. Affected by this issue is an unknown function of the file autocomplete/GetChannelSubscriptions of the component API Endpoint. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. CVE summarizes:

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to get channel subscription details without proper access to the channel via API call to the GET autocomplete/GetChannelSubscriptions endpoint.

The weakness was released by Lorenzo Gallegos. The advisory is available at mattermost.com. This vulnerability is handled as CVE-2025-53857 since 07/28/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 1.5.0 eliminates this vulnerability.

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

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

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

CNA Base Score: 3.7
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
09/26/2025 +45 days VulDB entry last update

Sourcesinfo

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

CVE: CVE-2025-53857 (🔒)
GCVE (CVE): GCVE-0-2025-53857
GCVE (VulDB): GCVE-100-319466

Entryinfo

Created: 08/11/2025 21:53
Updated: 09/26/2025 00:29
Changes: 08/11/2025 21:53 (66), 09/26/2025 00:29 (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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