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CVE-2025-59340

Hubspot Jinjava remote code execution

9.8 CRITICALEPSS 2.11%
  1. Published17 Sept 2025

Description

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Hubspot Jinjava< 2.8.1

Remediation

Fixed in
Hubspot Jinjava≥ 2.8.1

References

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Frequently asked

Is CVE-2025-59340 being actively exploited?

CVE-2025-59340 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.11%.

How severe is CVE-2025-59340?

CVE-2025-59340 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 2.11% probability of exploitation.

Which products are affected by CVE-2025-59340?

Affected products include Hubspot Jinjava.

How do I fix CVE-2025-59340?

Upgrade affected software to a fixed version, for example Hubspot Jinjava 2.8.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-59340 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.