Vulnerability Details CVE-2025-59340
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 54.9%
CVSS Severity
CVSS v3 Score 9.8
References
Products affected by CVE-2025-59340
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cpe:2.3:a:hubspot:jinjava:1.0.0
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cpe:2.3:a:hubspot:jinjava:1.0.1
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cpe:2.3:a:hubspot:jinjava:1.0.2
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cpe:2.3:a:hubspot:jinjava:1.0.3
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cpe:2.3:a:hubspot:jinjava:1.0.4
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cpe:2.3:a:hubspot:jinjava:1.0.5
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cpe:2.3:a:hubspot:jinjava:1.0.6
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cpe:2.3:a:hubspot:jinjava:1.0.7
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cpe:2.3:a:hubspot:jinjava:1.0.8
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cpe:2.3:a:hubspot:jinjava:1.0.9
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cpe:2.3:a:hubspot:jinjava:2.0.0
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cpe:2.3:a:hubspot:jinjava:2.0.1
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cpe:2.3:a:hubspot:jinjava:2.0.2
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cpe:2.3:a:hubspot:jinjava:2.0.3
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cpe:2.3:a:hubspot:jinjava:2.0.4
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cpe:2.3:a:hubspot:jinjava:2.0.5
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cpe:2.3:a:hubspot:jinjava:2.4.6
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cpe:2.3:a:hubspot:jinjava:2.5.4
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cpe:2.3:a:hubspot:jinjava:2.5.5
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cpe:2.3:a:hubspot:jinjava:2.5.6