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+
History

Tue, 25 Nov 2025 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google cloud Looker
Vendors & Products Google
Google cloud Looker

Mon, 24 Nov 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 24 Nov 2025 09:30:00 +0000

Type Values Removed Values Added
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+
Title Cross-Site Scripting (XSS) in Looker's Extension Loader leading to Admin Account Compromise
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 7.3, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GoogleCloud

Published: 2025-11-24T09:11:38.396Z

Updated: 2025-11-24T13:43:54.837Z

Reserved: 2025-11-05T10:43:57.797Z

Link: CVE-2025-12739

cve-icon Vulnrichment

Updated: 2025-11-24T13:24:50.706Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-11-24T10:15:59.567

Modified: 2025-11-25T22:16:16.690

Link: CVE-2025-12739

cve-icon Redhat

No data.