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Apache Wicket CVE-2026-76983

| EUVDEUVD-2026-68491 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
5.1
CVSS 4.0 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
5.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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:Amber
vuln.today AI
6.1 MEDIUM

Network vector, no privileges needed to inject data; user interaction required for XSS; scope changes to victim browser with low C/I impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (CNA).

CVSS VectorVendor

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
P
Scope
X

Lifecycle Timeline

3
CVSS changed
Aug 31, 2026 - 12:22 NVD
5.1 (MEDIUM)
CVE Published
Aug 31, 2026 - 10:50 cve.org
CRITICAL
Analysis Generated
Aug 31, 2026 - 08:17 vuln.today

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Cross-site scripting in Apache Wicket's AutoLabelTextResolver allows injection of arbitrary markup into web pages when attacker-controlled data reaches a form component's label model via FormComponent#setLabel(IModel). The resolver, registered by default in every WebApplication, writes label values directly into rendered markup without any escaping and ignores the escape-model-strings application setting entirely - meaning there was no available configuration workaround. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the vulnerable Wicket application passes attacker-controllable data into a form component's label model via FormComponent#setLabel(IModel), and that a page containing that form component is rendered to another user's browser (stored XSS) or to the attacker's own browser in a reflected scenario. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Severity is rated moderate by Apache, consistent with a typical stored or reflected XSS requiring user interaction (UI:R). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to the fixed releases: 8.19.0, 9.24.0, or 10.11.0 for the respective maintained branches. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-76983 vulnerability details – vuln.today

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