CVE-2023-1777: Github.com/mattermost/mattermost server/v6 Mattermost Vulnerable To Information Disclosure Vulnerability
MODERATECVE-2023-1777 is a MODERATE (CVSS 5.3) mattermost vulnerable to information disclosure vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Github.com/mattermost/mattermost server/v6 libraries in the Go ecosystem. The issue involves mattermost vulnerable to information disclosure. Remediation is available by upgrading affected packages to version 7.1.6, 7.8.1, 7.7.2, 6.0.0-20230301145909-10be118d99a5, 1.4.1-0.20230301145909-10be118d99a5.
CVE-2023-1777 at a Glance
Security Impact
CVSS: 5.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
How to Fix CVE-2023-1777
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 7.1.6Upgrade github.com/mattermost/mattermost-server to 7.8.1Upgrade github.com/mattermost/mattermost-server to 7.7.2Upgrade github.com/mattermost/mattermost-server to 7.1.6Upgrade github.com/mattermost/mattermost-server/v6 to 6.0.0-20230301145909-10be118d99a5Upgrade github.com/mattermost/mattermost-server to 1.4.1-0.20230301145909-10be118d99a5Run 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-2023-1777, 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 7.1.6), 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-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. 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-2023-1777 Affected Github.com/mattermost/mattermost server/v6 Versions
6 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost-server/v6
|
Go |
≥ 6.3.0
< 7.1.6
|
7.1.6
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 7.8.0
< 7.8.1
All 1 versions
7.8.0
|
7.8.1
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 7.7.0
< 7.7.2
|
7.7.2
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 7.1.0
< 7.1.6
|
7.1.6
|
|
github.com/mattermost/mattermost-server/v6
|
Go |
≥ 6.0.0-20211025164829-f7a8147b825c
< 6.0.0-20230301145909-10be118d99a5
|
6.0.0-20230301145909-10be118d99a5
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 1.4.1-0.20211025164829-f7a8147b825c
< 1.4.1-0.20230301145909-10be118d99a5
|
1.4.1-0.20230301145909-10be118d99a5
|
References
Frequently Asked Questions
What is CVE-2023-1777?
Which Github.com/mattermost/mattermost server/v6 versions are affected?
What version fixes CVE-2023-1777?
Is github.com/mattermost/mattermost-server/v6 affected?
Is github.com/mattermost/mattermost-server affected?
What is the CVSS score of CVE-2023-1777?
What CWE is associated with CVE-2023-1777?
How can I check Go dependencies for CVE-2023-1777?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-3wq5-3f56-v5xc",
"modified" : "2025-07-25T15:16:21Z",
"published" : "2023-03-31T12:30:16Z",
"aliases" : [ "CVE-2023-1777" ],
"summary" : "Mattermost vulnerable to information disclosure",
"details" : "Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server/v6"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.3.0"
}, {
"fixed" : "7.1.6"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 6.7.2"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.8.0"
}, {
"fixed" : "7.8.1"
} ]
} ],
"versions" : [ "7.8.0" ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.7.0"
}, {
"fixed" : "7.7.2"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 7.7.1"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.1.0"
}, {
"fixed" : "7.1.6"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 7.1.5"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server/v6"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.0.0-20211025164829-f7a8147b825c"
}, {
"fixed" : "6.0.0-20230301145909-10be118d99a5"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.4.1-0.20211025164829-f7a8147b825c"
}, {
"fixed" : "1.4.1-0.20230301145909-10be118d99a5"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-1777"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
}, {
"type" : "PACKAGE",
"url" : "github.com/mattermost/mattermost-server"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-668" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2023-04-07T21:02:25Z",
"nvd_published_at" : "2023-03-31T12:15:00Z"
}
}