CVE-2025-12739 (GCVE-0-2025-12739)
Vulnerability from cvelistv5 – Published: 2025-11-24 09:11 – Updated: 2025-11-24 13:43
VLAI
EPSS
VEX
Title
Cross-Site Scripting (XSS) in Looker's Extension Loader leading to Admin Account Compromise
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.
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+
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-24 13:18 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Google Cloud | Looker |
Affected:
0 , < 24.18.201
(custom)
Affected: 0 , < 25.0.79 (custom) Affected: 0 , < 25.6.66 (custom) Affected: 0 , < 25.12.7 (custom) Affected: 0 , < 25.16.0 (custom) Affected: 0 , < 25.18.0 (custom) Affected: 0 , < 25.20.0 (custom) |
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"value": "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.\u003cbr\u003e\u003cbr\u003eLooker-hosted and Self-hosted were found to be vulnerable.\u003cbr\u003eThis issue has already been mitigated for Looker-hosted instances.\u0026nbsp;No user action is required for these.\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003eSelf-hosted instances must be upgraded \u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003eas soon as possible\u003c/span\u003e. This vulnerability has been patched in all supported versions of Self-hosted.\u003c/span\u003e\u003cbr\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003eThe versions below have all been updated to protect from this vulnerability. You can download these versions at the Looker download page \u003c/span\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://download.looker.com/\"\u003ehttps://download.looker.com/\u003c/a\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e:\u003c/span\u003e\u003cul\u003e\u003cli\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e24.18.201+\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003cli\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e25.0.79+\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003cli\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e25.6.66+\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003cli\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e25.12.7+\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003cli\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e25.16.0+\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003cli\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e25.18.0+\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003cli\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e\u003cspan style=\"background-color: rgb(252, 252, 252);\"\u003e25.20.0+\u003cbr\u003e\u003cbr\u003e\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e\u003c/ul\u003e\u003c/div\u003e"
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"value": "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.\n\nLooker-hosted and Self-hosted were found to be vulnerable.\nThis issue has already been mitigated for Looker-hosted instances.\u00a0No user action is required for these.\n\n\nSelf-hosted instances must be upgraded as soon as possible. This vulnerability has been patched in all supported versions of Self-hosted.\nThe 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+\n * 25.0.79+\n * 25.6.66+\n * 25.12.7+\n * 25.16.0+\n * 25.18.0+\n * 25.20.0+"
}
],
"impacts": [
{
"capecId": "CAPEC-63",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-63 Cross-Site Scripting (XSS)"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "RED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "ACTIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-11-24T09:11:38.396Z",
"orgId": "f45cbf4e-4146-4068-b7e1-655ffc2c548c",
"shortName": "GoogleCloud"
},
"references": [
{
"url": "https://cloud.google.com/support/bulletins#gcp-2025-068"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Cross-Site Scripting (XSS) in Looker\u0027s Extension Loader leading to Admin Account Compromise",
"x_generator": {
"engine": "Vulnogram 0.4.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "f45cbf4e-4146-4068-b7e1-655ffc2c548c",
"assignerShortName": "GoogleCloud",
"cveId": "CVE-2025-12739",
"datePublished": "2025-11-24T09:11:38.396Z",
"dateReserved": "2025-11-05T10:43:57.797Z",
"dateUpdated": "2025-11-24T13:43:54.837Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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