Summary
Affected versions of macaron/i18n are vulnerable to open redirect vulnerability. This caused due to failed url path cleaning.
Product
macaron/i18n before 0.5.0.
Impact
A link to a server using i18n may appear safe, but ultimately redirect to a malicious site.
Steps to reproduce
https://server//www.checkmarx.com
Expected result:
checkmarx.com will be loaded
Remediation
Updated macaron/i18n to 0.5.0 or above.
Credit
This issue was discovered and reported by Checkmarx Security Researcher Dor Tumarkin.