GHSA-8ghr-w65f-j3qr
MEDIUMGHSA-8ghr-w65f-j3qr is a medium-severity (CVSS 6.3) CWE-862 vulnerability in fuxa-server. O3 Security confirms whether GHSA-8ghr-w65f-j3qr is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
FUXA's scheduler API missing admin check enables operator-to-admin escalation via scheduled device actions
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-8ghr-w65f-j3qr plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 368,543 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
fuxa-servernpmDescription
Summary
An authorization issue in the Scheduler API allowed authenticated non-admin users to create or modify scheduled actions that should be restricted to administrators.
Details
The Scheduler API did not correctly enforce administrator permissions when processing scheduler modifications.
As a result, authenticated users with non-administrative roles could create or modify scheduled actions that execute privileged operations, including device value changes and server-side script execution.
The issue was fixed in version 1.3.2 by enforcing the appropriate permission checks for scheduler modifications.
Impact
An operator-level user in FUXA reaches the PLC-write and server-side-script-execution surface that the platform otherwise restricts to administrators. In a SCADA deployment those two privileges cover setpoint control and the automation scripting engine. Alice schedules a job that rewrites a pump's enable tag, opens a safety interlock, or runs a project script that walks the device tree. The scheduled-action model extends the attack: Alice does not need to keep a session open for the action to fire, and a repeating schedule re-applies her changes every cycle even if an admin reverts them manually.
CVSS 3.1: AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L (Medium, 6.3). CWE-862.
Recommended Fix
Add authJwt.haveAdminPermission(permission) to both POST /api/scheduler and DELETE /api/scheduler, matching every other write endpoint that reaches runtime.devices.setTagValue or runtime.scriptsMgr.runScript.
schedulerApp.post("/api/scheduler", secureFnc, function(req, res) {
if (res.statusCode === 403) {
runtime.logger.error("api post scheduler: Tocken Expired");
return;
}
const permission = checkGroupsFnc(req);
const isGuest = authJwt.isGuestUser(req.userId, req.userGroups);
if (runtime.settings?.secureEnabled && (isGuest || !authJwt.haveAdminPermission(permission))) {
res.status(401).json({error:"unauthorized_error", message: "Unauthorized!"});
runtime.logger.error("api post scheduler: admin permission required");
return;
}
// ... rest unchanged ...
});
Apply the same change to the delete handler at server/api/scheduler/index.js:102-112. As defense in depth, the scheduler service should also validate each deviceActions entry against the creator's stored groups before execution (e.g., reject onRunScript on any scheduler whose author is not an admin at execution time).
A fix is available at https://github.com/frangoteam/FUXA/releases/tag/v1.3.2.
Found by aisafe.io
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | fuxa-server | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for fuxa-server. 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.
Remediation status
No patched version of fuxa-server has shipped for GHSA-8ghr-w65f-j3qr yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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-8ghr-w65f-j3qr 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-8ghr-w65f-j3qr. 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-8ghr-w65f-j3qr in your dependencies?
O3 detects GHSA-8ghr-w65f-j3qr across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.