CVE-2026-48047
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk26th percentile - higher than 26% of all known CVEs
Summary
XWiki Platform WebJars API, a package for XWiki, versions from 9.6-rc-1 to 16.10.17, 17.4.9, and 17.10.3 have a path traversal vulnerability that allows an attacker with a malicious WebJar extension installed to write arbitrary files. This requires admin access to a subwiki. Fixed in versions 16.10.17, 17.4.9, 17.10.3, and 18.0.0RC1.
Risk Assessment
An attacker with admin privileges could overwrite configuration files or set the superadmin password, potentially leading to full compromise of the XWiki instance.
Recommendation
Upgrade XWiki to one of the patched versions and be cautious when granting admin and script rights.
Original NVD description (English source)
XWiki Platform WebJars API is a package for XWiki, a generic wiki platform. Starting with version 9.6-rc-1 and prior to versions 16.10.17, 17.4.9, and 17.10.3, a potential path traversal vulnerability allow an attacker who manages to get a malicious WebJar extension installed on the wiki to write arbitrary files. While the consequences could be severe like overriding configuration files and setting the superadmin password, the attack first requires that the attacker already has admin access to at least a subwiki to be able to install a malicious extension. Further, the attacker needs to publish a malicious extension in an extension repository that is configured in the instance. This vulnerability has been patched in XWiki 16.10.17, 17.4.9, 17.10.3, and 18.0.0RC1. XWiki is not aware of any workarounds except for being careful whom developers grant script and admin rights to.