CVE-2026-84231 Apache Wicket - Stored XSS

Apache Wicket 8.0.0 through 8.19.0 contains a stored XSS caused by improper escaping of URLs in ExternalLink component's JavaScript click handler, letting attackers execute script when users activate the element.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
1 November 2026
Updated
3 November 2026
Weakness
CWE-79

Vendor fix

Upgrade to version 8.20.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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