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CVE-2026-75802— Apache Wicket: XSS in AjaxEditableLabel and its subclasses via IChoiceRenderer and defaultNullLabel

Quick assessment

Affected
Apache Software Foundation Apache Wicket
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Wicket是美国Apache基金会的一款Java Web应用开发框架。 Apache Wicket 8.0.0版本至8.18.0版本、9.0.0版本至9.23.0版本和10.0.0版本至10.10.0版本存在跨站脚本漏洞，该漏洞源于wicket-extensions组件中的AjaxEditableChoiceLabel在将IChoiceRenderer获取的显示值写入标签标记时未应用HTML转义，可能导致攻击者注入HTML或脚本在用户浏览器中执行。

CVSS 5.1 · Medium EPSS 0.51% · P42

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 3

VendorProduct Version RangeStatus
Apache Software Foundation Apache Wicket 8.0.0≤ 8.18.0 affected
9.0.0≤ 9.23.0 affected
10.0.0≤ 10.10.0 affected
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I. Basic Information for CVE-2026-75802

Vulnerability Information
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Vulnerability Title
Apache Wicket: XSS in AjaxEditableLabel and its subclasses via IChoiceRenderer and defaultNullLabel
Source: CVE Program / CVE List V5
Vulnerability Description
AjaxEditableChoiceLabel in wicket-extensions, when constructed with a non-null IChoiceRenderer, writes the display value obtained from that renderer into the label's markup without applying the HTML escaping Wicket performs by default for component model values. An attacker who can influence the choice or model data rendered by such a label can inject HTML or script that executes in the browser of any user who views the page. The same value is correctly escaped when the component's dropdown editor renders it as an option, so only the label rendering is affected. AjaxEditableLabel, AjaxEditableChoiceLabel and AjaxEditableMultiLineLabel write the value returned by the protected defaultNullLabel() method into the label's markup the same way when the component's model is empty, while the model value they show otherwise is escaped. The default implementation returns a constant, so an application is affected where it overrides that method and returns a value an attacker can influence. Neither value could be escaped by configuration, because escapeModelStrings had no effect on any of the three components: it is read by the label they render with rather than by the component itself, and nothing carried the setting across. This issue affects Apache Wicket: from 8.0.0 through 8.18.0, from 9.0.0 through 9.23.0, from 10.0.0 through 10.10.0. Older, unsupported releases are also affected; the display value from the renderer since 6.22.0 and the null label since 1.4.0. Users are recommended to upgrade to version 8.19.0, 9.24.0 or 10.11.0, which fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
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/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Wicket 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Wicket是美国Apache基金会的一款Java Web应用开发框架。 Apache Wicket 8.0.0版本至8.18.0版本、9.0.0版本至9.23.0版本和10.0.0版本至10.10.0版本存在跨站脚本漏洞，该漏洞源于wicket-extensions组件中的AjaxEditableChoiceLabel在将IChoiceRenderer获取的显示值写入标签标记时未应用HTML转义，可能导致攻击者注入HTML或脚本在用户浏览器中执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Wicket 8.0.0 ~ 8.18.0 -

II. Public POCs for CVE-2026-75802

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III. Intelligence Information for CVE-2026-75802

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Mailing List Discussions for CVE-2026-75802 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-31 · 10 CVEs total

CVE-2026-58301 5.9 MEDIUM Apache Shiro: Server-side POST request may be steered to an alternate host
CVE-2026-76985 5.1 MEDIUM Apache Wicket: XSS in Palette via getAdditionalAttributes
CVE-2026-76983 5.1 MEDIUM Apache Wicket: XSS in AutoLabelTextResolver via FormComponent.setLabel
CVE-2026-76984 5.1 MEDIUM Apache Wicket: XSS in MetaDataHeaderItem via addTagAttribute
CVE-2026-76982 5.1 MEDIUM Apache Wicket: XSS in Button via its model object
CVE-2026-76986 Apache Wicket: XSS in AbstractSingleSelectChoice via getNullValidDisplayValue
CVE-2026-71378 Apache Wicket: Cross-Site Request Forgery (CSRF) protection bypass in ResourceIsolationReq
CVE-2026-71257 Apache Wicket: Configured file upload limits are not enforced when the multipart request h
CVE-2026-70449 Apache Wicket: Path traversal in resource style/variation/locale

IV. Related Vulnerabilities

Same product: Apache Wicket
Same vendor: Apache Software Foundation
Same weakness: CWE-79

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