CVE-2021-30181: Apache Dubbo RCE on customers via Script route poisoning (Nashorn script injection)

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 60.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-01 · updated 2026-06-17

Description

Apache Dubbo prior to 2.6.9 and 2.7.9 supports Script routing which will enable a customer to route the request to the right server. These rules are used by the customers when making a request in order to find the right endpoint. When parsing these rules, Dubbo customers use ScriptEngine and run the rule provided by the script which by default may enable executing arbitrary code.

Affected products

Apache Software Foundation Apache Dubbo: from 2.5.0 before 2.6.10; from 2.7.0 before 2.7.10 — fixed in 2.6.10, 2.7.10

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Dubbo 2.6.10, 2.7.10. Check the vendor advisory for mitigations.

References

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