What is CVE-2021-25640?

CVE-2021-25640 is a medium-severity vulnerability in Apache Dubbo, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.1/10. Published 2021-06-01.

How severe is CVE-2021-25640?

Medium severity. CVSS v3 base score is 6.1 out of 10.

SSRF in Apache Dubbo

CVE-2021-25640

In Apache Dubbo prior to 2.6.9 and 2.7.9, the usage of parseURL method will lead to the bypass of white host check which can cause open redirect or SSRF vulnerability.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2021-06-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.021 (80.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Apache Dubbo
Apache Software Foundation Dubbo — versions Apache Dubbo 2.7.x, Apache Dubbo 2.6.x

Weakness classification (CWE)

References

lists.apache.org/thread.html/re4cab8855361a454d2af106fb3dad76259e723015fd7e09cb… (Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2021-25640?: CVE-2021-25640 is a medium-severity vulnerability in Apache Dubbo, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.1/10. Published 2021-06-01.
How severe is CVE-2021-25640?: Medium severity. CVSS v3 base score is 6.1 out of 10.