CVE-2025-12739— Cross-Site Scripting (XSS) in Looker's Extension Loader leading to Admin Account Compromise
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I. Basic Information for CVE-2025-12739
Vulnerability Information
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Vulnerability Title
Cross-Site Scripting (XSS) in Looker's Extension Loader leading to Admin Account Compromise
Source: NVD (National Vulnerability Database)
Vulnerability 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+
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Google Cloud Looker 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Cloud Looker是美国谷歌（Google）公司的一种在线工具，用于将数据转换为可定制的信息丰富的报告和仪表板。 Google Cloud Looker存在安全漏洞，该漏洞源于恶意URL构造问题，可能导致执行攻击者提供的脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Google Cloud | Looker | 0 ~ 24.18.201 | - | |
| Google Cloud | Looker | 0 ~ 24.18.201 | - |
II. Public POCs for CVE-2025-12739
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Google Cloud · 2025-11-24 · 3 CVEs total
| CVE-2025-12741 | Arbitrary File Write in Denodo dialect of Looker allows Remote Code Execution | |
| CVE-2025-12740 | Remote Command Execution in Looker via IBM DB2 JDBC drive |
IV. Related Vulnerabilities
Same product: Looker
- CVE-2025-12742
Remote Code Execution in Looker via Teradata JDBC Driver - CVE-2025-12741
Arbitrary File Write in Denodo dialect of Looker allows Remo - CVE-2025-12740
Remote Command Execution in Looker via IBM DB2 JDBC drive - CVE-2025-12414
Looker account compromise via punycode homograph attack - CVE-2025-12743
SQL Injection in Looker Project Generation Endpoint Allows A
Same vendor: Google Cloud
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Remote Code Execution in Google Agent Development Kit (ADK) - CVE-2026-3136
Google Cloud Build Comment Control Bypass - CVE-2026-2244
Sensitive Data Exposure in Google Cloud Vertex AI Workbench - CVE-2026-2473
Bucket Squatting in Vertex AI Experiments leads to RCE and M
Same weakness: CWE-79
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V. Comments for CVE-2025-12739
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