Description (CNA)
Thymeleaf is a server-side Java template engine for web and standalone environments. Versions 3.1.3.RELEASE and prior contain a security bypass vulnerability in the expression execution mechanisms. Although the library provides mechanisms to prevent expression injection, it fails to properly restrict the scope of accessible objects, allowing specific potentially sensitive objects to be reached from within a template. If an application developer passes unvalidated user input directly to the template engine, an unauthenticated remote attacker can bypass the library's protections to achieve Server-Side Template Injection (SSTI). This issue has ben fixed in version 3.1.4.RELEASE.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| thymeleaf / thymeleaf | affected < 3.1.4.RELEASE |
| thymeleaf / org.thymeleaf:thymeleaf-spring5 | affected < 3.1.4.RELEASE |
| thymeleaf / org.thymeleaf:thymeleaf-spring6 | affected < 3.1.4.RELEASE |
CWE
CWE-917, CWE-1336
References
ADP enrichment
No English description supplied.
No references supplied.
A flaw was found in Thymeleaf, a server-side Java template engine. An unauthenticated remote attacker can exploit a security bypass vulnerability in the expression execution mechanisms. By providing unvalidated user input directly to the template engine, the attacker can bypass the library's protections, leading to Server-Side Template Injection (SSTI). This allows access to potentially sensitive objects from within a template.