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TI-2026-65703 Aliases CVE-2026-103474GHSA-hfh8-jhpw-h99w

yii2-starter-kit through 4.2.0 Unrestricted File Upload RCE

Priority MEDIUM 40CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

yii2-starter-kit through 4.2.0 fails to validate file types in the backend storage upload actions, allowing authenticated managers to upload PHP files. Attackers with manager role can upload PHP scripts to the web-accessible storage directory and request them to execute arbitrary code on the server.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00388 33rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
yii2-starter-kityii2-starter-kitup to 4.2.0—No fix listedCNA
  • yii2-starter-kit Vendoryii2-starter-kit Affected up to 4.2.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-103474
  2. 2026-10-03 Alias added: GHSA-hfh8-jhpw-h99w

References

Other 3

  • TI-2026-65704 yii2-starter-kit through 4.2.0 Debug and Gii Module Exposure CVSS 4.0CRITICAL 9.3
  • TI-2026-65705 yii2-starter-kit through 4.2.0 Unauthorized File Download via attachment-download CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences