CVE-2023-2783: Github.com/mattermost/mattermost server/v6 Mattermost Server Missing Authorization Vulnerability Vulnerability
MODERATECVE-2023-2783 is a MODERATE (CVSS 4.3) mattermost server missing authorization vulnerability vulnerability (CWE-862: Missing Authorization) affecting Github.com/mattermost/mattermost server/v6 libraries in the Go ecosystem. The issue involves mattermost server missing authorization vulnerability. Remediation is available by upgrading affected packages to version 7.10.1, 7.9.4, 7.8.5, 6.0.0-20230511130429-1629a6ca7fed.
CVE-2023-2783 at a Glance
Security Impact
CVSS: 4.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N).
How to Fix CVE-2023-2783
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost server/v6 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/mattermost/mattermost-server/v6 to 7.10.1Upgrade github.com/mattermost/mattermost-server/v6 to 7.9.4Upgrade github.com/mattermost/mattermost-server/v6 to 7.8.5Upgrade github.com/mattermost/mattermost-server/v6 to 6.0.0-20230511130429-1629a6ca7fedRun the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost-server/v6How to Check if You Are Affected
To determine whether your application is affected by CVE-2023-2783, inspect your project dependencies for Github.com/mattermost/mattermost server/v6:
inspect dependencies for github.com/mattermost/mattermost-server/v6Analyze the terminal output to locate any version of Github.com/mattermost/mattermost server/v6 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.10.1), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Github.com/mattermost/mattermost server/v6, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2023-2783 Affected Github.com/mattermost/mattermost server/v6 Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost-server/v6
|
Go |
≥ 7.10.0
< 7.10.1
All 1 versions
7.10.0
|
7.10.1
|
|
github.com/mattermost/mattermost-server/v6
|
Go |
≥ 7.9.0
< 7.9.4
|
7.9.4
|
|
github.com/mattermost/mattermost-server/v6
|
Go |
≥ 6.0.0
< 7.8.5
|
7.8.5
|
|
github.com/mattermost/mattermost-server/v6
|
Go |
< 6.0.0-20230511130429-1629a6ca7fed
|
6.0.0-20230511130429-1629a6ca7fed
|
References
Frequently Asked Questions
What is CVE-2023-2783?
Which Github.com/mattermost/mattermost server/v6 versions are affected?
What version fixes CVE-2023-2783?
Is github.com/mattermost/mattermost-server/v6 affected?
What is the CVSS score of CVE-2023-2783?
What CWE is associated with CVE-2023-2783?
How can I check Go dependencies for CVE-2023-2783?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-455c-vqrf-mghr",
"modified" : "2025-07-25T14:50:30Z",
"published" : "2023-06-16T09:30:24Z",
"aliases" : [ "CVE-2023-2783" ],
"summary" : "Mattermost Server Missing Authorization vulnerability",
"details" : "Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server/v6"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.10.0"
}, {
"fixed" : "7.10.1"
} ]
} ],
"versions" : [ "7.10.0" ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server/v6"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.9.0"
}, {
"fixed" : "7.9.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server/v6"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.0.0"
}, {
"fixed" : "7.8.5"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server/v6"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "6.0.0-20230511130429-1629a6ca7fed"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-2783"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/mattermost/mattermost-server"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-862" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2023-06-23T21:37:38Z",
"nvd_published_at" : "2023-06-16T09:15:09Z"
}
}