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CVE-2026-50543— Xibo: Missing Authorization on POST /displaygroup/criteria/{displayGroupId} Allows Arbitrary Scheduling Criteria Injection to Player Devices

Quick assessment

Affected
xibosignage xibo-cms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Xibo 是一个开源的数字标牌平台，包含基于 Web 的内容管理系统和 Windows 显示播放器软件。在 4.4.3 版本之前， 接口存在授权缺失漏洞，允许已认证用户通过 XMR 向任意显示终端发送准则更新。这些准则用于控制排程变更，可能改变播放行为，例如在天气晴朗时错误地播放原本计划在下雨天显示的内容。利用该漏洞需满足 CMS 已启用“排程准则（Schedule Criteria）”功能。该问题已在 4.4.3 版本中修复。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
xibosignage xibo-cms < 4.4.3 affected
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I. Basic Information for CVE-2026-50543

Vulnerability Information
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Vulnerability Title
Xibo: Missing Authorization on POST /displaygroup/criteria/{displayGroupId} Allows Arbitrary Scheduling Criteria Injection to Player Devices
Source: CVE Program / CVE List V5
Vulnerability 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 authorization on `POST /displaygroup/criteria/{displayGroupId}` allows an authenticated user to send criteria updates to any display via `XMR`. These criteria determine schedule changes and can alter playback, for example by causing content scheduled for rainy weather to play when it is not raining. Exploitation requires `Schedule Criteria` to be in use on the CMS. This issue is fixed in version 4.4.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
xibosignage xibo-cms < 4.4.3 -

II. Public POCs for CVE-2026-50543

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III. Intelligence Information for CVE-2026-50543

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Vendor Pages for CVE-2026-50543 (2)

Other References for CVE-2026-50543 (4)

Same Patch Batch · xibosignage · 2026-10-28 · 5 CVEs total

CVE-2026-52729 7.1 HIGH Xibo: IDOR (Broken Object-Level Authorization) on PUT/DELETE /action/{id} Allows Arbitrary
CVE-2026-50541 6.5 MEDIUM Xibo: IDOR (Broken Object-Level Authorization) on GET /dataset/export/csv/{id} Allows Arbi
CVE-2026-50539 6.5 MEDIUM Xibo: Missing Object-Level Authorization on /notification/export/{id} Allows Authenticated
CVE-2026-50542 5.4 MEDIUM Xibo: IDOR (Broken Object-Level Authorization) on GET /layout/status/{id} Allows Arbitrary

IV. Related Vulnerabilities

Same product: xibo-cms
Same vendor: xibosignage
Same weakness: CWE-862