CVE-2026-50543

MEDIUM 4.3

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

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-862
Vendor	xibosignage
Product	xibo-cms
Published	Oct 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

xibosignage / xibo-cms

< 4.4.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-737f-mfxg-jv9q github.com: https://github.com/xibosignage/xibo-cms/pull/3488 github.com: https://github.com/xibosignage/xibo-cms/commit/93587cf872392e91534bb50aa6be071821383e25 github.com: https://github.com/xibosignage/xibo-cms/commit/aeca5d6bfbc5eb8a825e6950913c9ab25dc9edc0 github.com: https://github.com/xibosignage/xibo-cms/releases/tag/4.4.3 github.com: https://github.com/xibosignage/xibo-cms/releases/tag/4.5.0-beta