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Fencer Vulns
medium 6.1

CVE-2021-25640 json

Open Redirect or SSRF vulnerability usage of parseURL

published 2021-05-31 5 y ago modified 2026-06-17 4 mo ago also GHSA-gw4j-4229-q4px , EUVD-2022-1431

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.apache.dubbo:dubbo 2.7.10
  • maven com.alibaba:dubbo 2.6.9
  • Apache Software Foundation Apache Dubbo 2.6.9, 2.7.9

Exploit prediction

2.07% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.dubbo:dubbo
>=2.5.0, <2.7.10
2.7.10
maven com.alibaba:dubbo
>=2.5.0, <2.6.9
2.6.9

Affected products

  • Apache Software Foundation Apache Dubbo

Classification

Weakness
  • CWE-918 Server-Side Request Forgery
  • CWE-601 URL Redirection to Untrusted Site

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.