yii2-starter-kit through 4.2.0 exposes the Yii debug and Gii modules to all IP addresses by setting allowedIPs to ['*'] in its default development configuration. Unauthenticated remote attackers can access the debug endpoint to read sensitive data including session cookies and database queries, or access the Gii endpoint to generate and write PHP files into the application directory.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00671.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
yii2-starter-kit yii2-starter-kit unaffected
Version Status Constraints
0 affected ≤ 4.2.0

No data.

No data.

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Vendors Products
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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/yii-starter-kit/yii2-starter-kit cve-icon cve-icon
https://github.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/common/config/web.php#L21 cve-icon cve-icon
https://github.com/yii-starter-kit/yii2-starter-kit/issues/797 cve-icon cve-icon
https://www.vulncheck.com/advisories/yii2-starter-kit-through-4.2.0-debug-and-gii-module-exposure cve-icon cve-icon
History

Thu, 01 Oct 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Yii2-starter-kit
Yii2-starter-kit yii2-starter-kit
Vendors & Products Yii2-starter-kit
Yii2-starter-kit yii2-starter-kit

Wed, 30 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 30 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Description yii2-starter-kit through 4.2.0 exposes the Yii debug and Gii modules to all IP addresses by setting allowedIPs to ['*'] in its default development configuration. Unauthenticated remote attackers can access the debug endpoint to read sensitive data including session cookies and database queries, or access the Gii endpoint to generate and write PHP files into the application directory.
Title yii2-starter-kit through 4.2.0 Debug and Gii Module Exposure
Weaknesses CWE-489
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-30T19:13:28.143Z

Reserved: 2026-09-30T16:03:00.735Z

Link: CVE-2026-103475

cve-icon Vulnrichment

Updated: 2026-09-30T19:13:23.630Z

cve-icon NVD

Status : Deferred

Published: 2026-09-30T18:18:17.817

Modified: 2026-09-30T20:17:31.447

Link: CVE-2026-103475

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T15:38:45Z

Weaknesses