---
id: CVE-2025-12739
title: >-
  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
summary: >-
  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.


  Loo…
severity: none
cwe:
  - CWE-79
published: '2025-11-24'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T10:10:00.227'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12739'
references:
  - url: 'https://cloud.google.com/support/bulletins#gcp-2025-068'
    label: f45cbf4e-4146-4068-b7e1-655ffc2c548c
tags:
  - nvd
epss: 0.00307
epssPercentile: 0.21534
ingestedAt: '2026-10-08T10:28:22.136Z'
---

## Overview

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+

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.