Hubspot: >> Jinjava Security Vulnerabilities
jinjava is a Java-based template engine based on django template syntax, adapted to render jinja templates. Priori to 2.8.1, by using mapper.getTypeFactory().constructFromCanonical(), it is possible to instruct the underlying ObjectMapper to deserialize attacker-controlled input into arbitrary classes. This enables the creation of semi-arbitrary class instances without directly invoking restricted methods or class literals. As a result, an attacker can escape the sandbox and instantiate classes such as java.net.URL, opening up the ability to access local files and URLs(e.g., file:///etc/passwd). With further chaining, this primitive can potentially lead to remote code execution (RCE). This vulnerability is fixed in 2.8.1.
CVSS Score
9.8
EPSS Score
0.004
Published
2025-09-17
Jinjava before 2.5.4 allow access to arbitrary classes by calling Java methods on objects passed into a Jinjava context. This could allow for abuse of the application class loader, including Arbitrary File Disclosure.
CVSS Score
6.5
EPSS Score
0.003
Published
2021-02-19
Jinjava before 2.4.6 does not block the getClass method, related to com/hubspot/jinjava/el/ext/JinjavaBeanELResolver.java.
CVSS Score
5.3
EPSS Score
0.007
Published
2019-01-03