How severe is CVE-2021-30181?

CVE-2021-30181 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-30181 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 61% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30181?

CVE-2021-30181 affects Apache Dubbo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30181?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-30181 published?

CVE-2021-30181 was published on 2021-06-01 and last updated on 2026-06-17.

CVE-2021-30181

CVE-2021-30181 is a critical-severity vulnerability in Apache Dubbo with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 61% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 61% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apache Dubbo
Published: 2021-06-01
Last modified: 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.

Frequently asked questions

What is CVE-2021-30181?: 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.
How severe is CVE-2021-30181?: CVE-2021-30181 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-30181 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 61% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30181?: CVE-2021-30181 affects Apache Dubbo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30181?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-30181 published?: CVE-2021-30181 was published on 2021-06-01 and last updated on 2026-06-17.

References

https://lists.apache.org/thread.html/re22410dc704a09bc7032ddf15140cf5e7df3e8ece390fc9032ff5587%40%3Cdev.dubbo.apache.org%3E

Affected products (1)

cpe:2.3:a:apache:dubbo:*:*:*:*:*:*:*:*

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