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CVE-2025-12739— Cross-Site Scripting (XSS) in Looker's Extension Loader leading to Admin Account Compromise

Quick assessment

Affected
Google Cloud Looker
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 6.5 Difficulty: Easy EPSS 0.31% · P21
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
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

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III. Intelligence Information for CVE-2025-12739

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Other References for CVE-2025-12739 (1)

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
Same vendor: Google Cloud
Same weakness: CWE-79

V. Comments for CVE-2025-12739

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