GHSA-vpcr-fqpc-386h
MEDIUMGHSA-vpcr-fqpc-386h is a medium-severity (CVSS 4) CWE-862 vulnerability in github.com/mattermost/mattermost-plugin-confluence. O3 Security confirms whether GHSA-vpcr-fqpc-386h is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Mattermost Confluence Plugin has Missing Authorization vulnerability
Real-World Exposure
github.com/mattermost/mattermost-plugin-confluenceReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Mattermost Confluence Plugin versions < 1.5.0 fail to check user access to the channel, which allows attackers to get channel subscription details without proper access to the channel via an API call to the Get Channel Subscriptions details endpoint.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/mattermost/mattermost-plugin-confluence | all versions | 1.5.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/mattermost/mattermost-plugin-confluence. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/mattermost/mattermost-plugin-confluence to 1.5.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-vpcr-fqpc-386h is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-vpcr-fqpc-386h is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-vpcr-fqpc-386h. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-vpcr-fqpc-386h in your dependencies?
O3 detects GHSA-vpcr-fqpc-386h across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.