CVE-2026-83539 Apache Wicket - Stored XSS

Apache Wicket 8.0.0 to 8.19.0, 9.0.0 to 9.24.0, and 10.0.0 to 10.11.0 contain a stored XSS caused by improper neutralization of input in SmartLinkLabel and SmartLinkMultiLineLabel components, letting attackers execute script via crafted URLs, exploit requires user to activate the malicious link.

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
Client Script Exec
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 Apache Wicket versions 8.20.0, 9.25.0, or 10.12.0 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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