CVE-2018-9090

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-09-24 · updated 2026-06-17
Weakness: CWE-79

Description

CoreOS Tectonic 1.7.x and 1.8.x before 1.8.7-tectonic.2 deploys the Grafana web application using default credentials (admin/admin) for the administrator account located at grafana-credentials secret. This occurs because CoreOS does not randomize the administrative password to later be configured by Tectonic administrators. An attacker can insert an XSS payload into the dashboards.

Affected products

RedHat Tectonic: from 1.7.1-tectonic.1 before 1.8.7-tectonic.2 — fixed in 1.8.7-tectonic.2

How to fix

Upgrade to a fixed version: RedHat Tectonic 1.8.7-tectonic.2. Check the vendor advisory for mitigations.

References

https://coreos.com/tectonic/releases/
https://coreos.com/tectonic/releases/#1.8.7-tectonic.2
https://coreos.com/tectonic/releases/
https://coreos.com/tectonic/releases/#1.8.7-tectonic.2

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