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bdu:2026-05573

EUVD-2026-291456

fkie_cve-2026-40105

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Versions 10.4-rc-1, through 16.10.15, 17.0.0-rc-1, through 17.4.7 and 17.5.0-rc-1 through 17.10.0 contain a reflected cross-site scripting vulnerability (XSS) in the comparison view between revisions of a page allows executing JavaScript code in the user's browser. If the current user is an admin, this can not only affect the current user but also the confidentiality, integrity and availability of the whole XWiki instance. If developers are unable to update immediately, they can apply the patch manually to templates/changesdoc.vm in the deployed WAR.

GHSA-w4fj-87j5-f25c — XWiki has Reflected Cross-Site Scripting (XSS) in page history compare

Affected: Maven: org.xwiki.platform:xwiki-platform-web-templates

### Impact A reflected cross-site scripting vulnerability (XSS) in the compare view between revisions of a page allows executing JavaScript code in the user's browser. If the current user is an admin, this can not only affect the current user but also the confidentiality, integrity and availability of the whole XWiki instance.

### Patches The problem has been patched by properly escaping the URL parameters.

### Workarounds The [patch](https://github.com/xwiki/xwiki-platform/commit/3c8a2ec985641367015c2db937574fcd360c788c#diff-a5e75a4e3820a63c02a32666dda67c73ee7885ab8e7f67e52cfcb3be5a13326e) can be applied manually to `templates/changesdoc.vm` in the deployed WAR.

### Attribution

XWiki thanks Mike Cole @mikecole-mg for discovering and reporting this vulnerability.

WID-SEC-W-2026-1089 — xwiki: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in xwiki ausnutzen, um einen Denial of Service Angriff durchzuführen, und um einen Cross-Site Scripting Angriff durchzuühren.