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+
Published: 2025-11-24
Score: 7.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

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'}

Subscriptions

Google Cloud Looker
cve-icon MITRE

Status: PUBLISHED

Assigner: GoogleCloud

Published:

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 : Deferred

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

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-12739

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-11-25T11:02:32Z

Weaknesses