Vulnerability · Published Nov 24, 2025 · Assigned by GoogleCloud
CVE-2025-12739Cross-Site Scripting (XSS) in Looker's Extension Loader leading to Admin Account Compromise
High 7.3
In plain English
A high-severity cross-site scripting in Looker from Google Cloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Official description
An attacker with viewer permissions in Looker could craft a malicious URL that, when opened by a Looker admin, would execute an attacker-supplied script. Exploitation required at least one Looker extension installed on the instance. Looker-hosted and Self-hosted were found to be vulnerable. This issue has already been mitigated for Looker-hosted instances. No user action is required for these. Self-hosted instances must be upgraded as soon as possible. This vulnerability has been patched in all supported versions of Self-hosted. The versions below have all been updated to protect from this vulnerability. You can download these versions at the Looker download page https://download.looker.com/ : * 24.18.201+ * 25.0.79+ * 25.6.66+ * 25.12.7+ * 25.16.0+ * 25.18.0+ * 25.20.0+
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Google Cloud | Looker | 0 – before 24.18.2010 – before 25.0.790 – before 25.6.660 – before 25.12.70 – before 25.16.00 – before 25.18.00 – before 25.20.0 |
| Google Cloud | Looker | 0 – before 24.18.2010 – before 25.0.790 – before 25.6.660 – before 25.12.70 – before 25.16.00 – before 25.18.00 – before 25.20.0 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/U:Red