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Security Advisories: GSA_kwCzR0hTQS1xOWhnLTlxajItbXhmOc4AAz9u

XWiki Platform vulnerable to cross-site scripting via xcontinue parameter in previewactions template

Impact

Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS).
It's possible to exploit the previewactions template to perform a XSS, e.g. by using URL such as:

/xwiki/bin/get/FlamingoThemes/Cerulean?xpage=xpart&vm=previewactions.vm&xcontinue=javascript:alert(document.domain)

This vulnerability exists since XWiki 6.1-rc-1.

Patches

The vulnerability has been patched in XWiki 14.10.5 and 15.1-rc-1.

Workarounds

It's possible to workaround the vulnerability by editing the template previewactions.vm to perform checks on it, but note that the appropriate fix involves new APIs that have been recently introduced in XWiki. See the referenced jira tickets.

References

For more information

If you have any questions or comments about this advisory:

Attribution

This vulnerability has been reported by René de Sain @renniepak.

Permalink: https://github.com/advisories/GHSA-q9hg-9qj2-mxf9
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1xOWhnLTlxajItbXhmOc4AAz9u
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 1 year ago
Updated: about 1 year ago


CVSS Score: 9.7
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Identifiers: GHSA-q9hg-9qj2-mxf9, CVE-2023-35162
References: Repository: https://github.com/xwiki/xwiki-platform
Blast Radius: 1.0

Affected Packages

maven:org.xwiki.platform:xwiki-platform-flamingo-skin-resources
Affected Version Ranges: >= 15.0-rc-1, < 15.1-rc-1, >= 6.1-rc-1, < 14.10.5
Fixed in: 15.1-rc-1, 14.10.5