CVE-2026-103475
yii2-starter-kit through 4.2.0 Debug and Gii Module Exposure
yii2-starter-kit yii2-starter-kit
CVSS
9.3CriticalExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.40%Chance of exploitation activity in the next 30 days, higher than 32% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
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.
Text from CVE List
Affected versions 1
- yii2-starter-kitaffected: all versions through 4.2.0CVE List
References 4
- vulncheck.com/advisories/yii2-starter-kit-through-4.2.0-debug-and-gii-module-exposureAdvisoryvia CVE List
- github.com/yii-starter-kit/yii2-starter-kit/issues/797Referencevia CVE List
- github.com/yii-starter-kit/yii2-starter-kitReferencevia CVE List
- github.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/common/config/web.php#L21Referencevia CVE List