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Description
The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.
Modes of Introduction:
– Architecture and Design
Related Weaknesses
CWE-94
Consequences
Integrity: Execute Unauthorized Code or Commands
Potential Mitigations
Phase: Architecture and Design
Description:
Choose a template engine that offers a sandbox or restricted mode, or at least limits the power of any available expressions, function calls, or commands.
Phase: Implementation
Description:
Use the template engine’s sandbox or restricted mode, if available.
CVE References
- CVE-2017-16783
- server-side template injection in content management server
- CVE-2020-9437
- authentication / identity management product has client-side template injection
- CVE-2020-4027
- bypass of Server-Side Template Injection protection mechanism with macros in Velocity templates
- CVE-2020-26282
- web browser proxy server allows Java EL expressions from Server-Side Template Injection
- CVE-2019-19999
- product does not use a “safe” setting for a FreeMarker configuration, allowing SSTI
- CVE-2018-20465
- product allows read of sensitive database username/password variables using server-side template injection
