GHSA-j66h-xhpr-7q5g
MEDIUMGHSA-j66h-xhpr-7q5g is a medium-severity (CVSS 5) CWE-862 vulnerability in github.com/mattermost/mattermost-plugin-confluence. O3 Security confirms whether GHSA-j66h-xhpr-7q5g 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 fails to check user access of the Confluence space, allowing attackers to create a subscription to a Confluence space the user does not have access to via the create subscription 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-j66h-xhpr-7q5g 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-j66h-xhpr-7q5g 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-j66h-xhpr-7q5g. 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-j66h-xhpr-7q5g in your dependencies?
O3 detects GHSA-j66h-xhpr-7q5g across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.