CVE-2023-40035: Craft CMS vulnerable to Remote Code Execution via validatePath bypass

high Affects craftcms/cms. Feed 2026.10.29.1, updated 2026-10-28; published 2023-08-21; advisory modified 2026-09-10.

Craft CMS vulnerable to Remote Code Execution via validatePath bypass

Package: craftcms/cms Composer
Affected versions: >=4.0.0-RC1 and <4.4.15 or >=3.0.0 and <3.8.15
Fixed in: 4.4.15, 3.8.15
Severity: high CVSS 7.2
Exploitation: not on CISA KEV · EPSS 2% (83.4th percentile)
Published: 2023-08-21
Source: osv.dev

References

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2025-32432 KEV critical Craft CMS Allows Remote Code Execution same package: craftcms/cms
CVE-2024-56145 KEV critical Craft CMS has potential RCE when PHP `register_argc_argv` config setting is enabled same package: craftcms/cms
CVE-2025-23209 KEV high Craft CMS has a potential RCE with a compromised security key same package: craftcms/cms
CVE-2025-35939 KEV medium Craft CMS stores arbitrary content provided by unauthenticated users in session files same package: craftcms/cms
CVE-2023-41892 critical Craft CMS Remote Code Execution vulnerability same package: craftcms/cms
CVE-2024-37843 critical Craft CMS SQL injection vulnerability via the GraphQL API endpoint same package: craftcms/cms