_GitLab Plugin allows cross-channel post injection and phishing via missing channel permission checks in issue API endpoints_
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mattermost | Mattermost | unaffected |
|
No data.
No data.
| Vendor | Product | Versions | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mattermost | Mattermost |
|
Vendor Solution
Update Mattermost Plugins to versions 11.9.0, 10.11.21, 11.7.6 or higher.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.294% probability within 30 days)
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost Plugins versions <=11.8 10.20.11 11.5.7.0 _The Mattermost GitLab plugin fails to verify channel permissions when processing API requests with a caller-supplied_ {{post_id}}_, and fails to validate the_ {{web_url}} _parameter against the configured GitLab instance, which allows an authenticated attacker to inject bot-authored messages containing arbitrary URLs into channels they do not have access to via the_ {{createIssue}} _and_ {{attachCommentToIssue}} _API endpoints._ Mattermost Advisory ID: MMSA-2026-00673 | |
| Title | _GitLab Plugin allows cross-channel post injection and phishing via missing channel permission checks in issue API endpoints_ | |
| Weaknesses | CWE-862 | |
| References |
| |
| Metrics |
cvssV3_1
|