cve.bz

CVE-2021-23937

7.5 highEPSS 4.3%

High (7.5) in apache wicket. EPSS 4.3% chance of exploitation in the next 30 days. Fixed in org.apache.wicket:wicket-core 7.18.0, 8.12.0, 9.3.0.

A DNS proxy and possible amplification attack vulnerability in WebClientInfo of Apache Wicket allows an attacker to trigger arbitrary DNS lookups from the server when the X-Forwarded-For header is not properly sanitized. This DNS lookup can be engineered to overload an internal DNS server or to slow down request processing of the Apache Wicket application causing a possible denial of service on either the internal infrastructure or the web application itself. This issue affects Apache Wicket Apache Wicket 9.x version 9.2.0 and prior versions; Apache Wicket 8.x version 8.11.0 and prior versions; Apache Wicket 7.x version 7.17.0 and prior versions and Apache Wicket 6.x version 6.2.0 and later versions.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
4.3% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-31)
CWE
CWE-200
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-hmhg-95wh-r699Mavenorg.apache.wicket:wicket-core>=9.0.0 <9.3.09.3.0
GHSA-hmhg-95wh-r699Mavenorg.apache.wicket:wicket-core>=8.0.0 <8.12.08.12.0
GHSA-hmhg-95wh-r699Mavenorg.apache.wicket:wicket-core<7.18.07.18.0

References

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