by Kastro
Paper/Archive/CVE-2026-103475

CVE-2026-103475

yii2-starter-kit yii2-starter-kit — yii2-starter-kit through 4.2.0 Debug and Gii Module Exposure

EPSS 0.4%CVSS 9.3
critical.is priorityof 100
35
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 33.8.338 × 206.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
yii2-starter-kit≤ 4.2.0–CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/yii-starter-kit/yii2-starter-kit/issues/797refgithub.com/yii-starter-kit/yii2-starter-kitwriteupgithub.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/common/config/web.php#L21writeupvulncheck.com/advisories/yii2-starter-kit-through-4.2.0-debug-and-gii-module-exposure