CVE-2017-18916: Github.com/mattermost/mattermost server Mattermost Server Has Improper Authorization Vulnerability
MODERATECVE-2017-18916 is a MODERATE mattermost server has improper authorization vulnerability (CWE-284: Improper Access Control) affecting Github.com/mattermost/mattermost server libraries in the Go ecosystem. The issue involves mattermost server has improper authorization for integration requests. Remediation is available by upgrading affected packages to version 3.6.7-0.20170420152529-0968e4079e0a, 3.7.5, 3.8.2.
CVE-2017-18916 at a Glance
How to Fix CVE-2017-18916
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost server 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 to 3.6.7-0.20170420152529-0968e4079e0aUpgrade github.com/mattermost/mattermost-server to 3.7.5Upgrade github.com/mattermost/mattermost-server to 3.8.2Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost-serverHow to Check if You Are Affected
To determine whether your application is affected by CVE-2017-18916, inspect your project dependencies for Github.com/mattermost/mattermost server:
inspect dependencies for github.com/mattermost/mattermost-serverAnalyze the terminal output to locate any version of Github.com/mattermost/mattermost server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.6.7-0.20170420152529-0968e4079e0a), 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-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Github.com/mattermost/mattermost server, 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-2017-18916 Affected Github.com/mattermost/mattermost server Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost-server
|
Go |
< 3.6.7-0.20170420152529-0968e4079e0a
|
3.6.7-0.20170420152529-0968e4079e0a
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 3.7.0
< 3.7.5
|
3.7.5
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 3.8.0
< 3.8.2
|
3.8.2
|
References
Frequently Asked Questions
What is CVE-2017-18916?
Which Github.com/mattermost/mattermost server versions are affected?
What version fixes CVE-2017-18916?
Is github.com/mattermost/mattermost-server affected?
What CWE is associated with CVE-2017-18916?
How can I check Go dependencies for CVE-2017-18916?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-x33g-375j-jhf7",
"modified" : "2026-02-06T22:58:44Z",
"published" : "2022-05-24T17:21:07Z",
"aliases" : [ "CVE-2017-18916" ],
"summary" : "Mattermost Server has Improper Authorization for Integration Requests",
"details" : "An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. API endpoint access control does not honor an integration permission restriction.",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "3.6.7-0.20170420152529-0968e4079e0a"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.7.0"
}, {
"fixed" : "3.7.5"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.8.0"
}, {
"fixed" : "3.8.2"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-18916"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost/commit/0968e4079e0aa670254f3fe3a7248d126e3cf877"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost/commit/b74e85653660525d351d090a1e1874ae933bcbc8"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost/commit/fb325cc339eb8d8efb60dbadc48fd38897201c6f"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/mattermost/mattermost"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-284" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-02-06T22:58:44Z",
"nvd_published_at" : "2020-06-19T20:15:00Z"
}
}