9.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
0.67 Medium
EPSS
Percentile
98.0%
Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS).
Itβs possible to exploit the previewactions template to perform a XSS, e.g. by using URL such as:
> <hostname>/xwiki/bin/get/FlamingoThemes/Cerulean?xpage=xpart&vm=previewactions.vm&xcontinue=javascript:alert(document.domain)
This vulnerability exists since XWiki 6.1-rc-1.
The vulnerability has been patched in XWiki 14.10.5 and 15.1-rc-1.
Itβs 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.
If you have any questions or comments about this advisory:
This vulnerability has been reported by RenΓ© de Sain @renniepak.