Medium severity · published Oct 28, 2026
CVE-2026-50543
Xibo: Missing Authorization on POST /displaygroup/criteria/{displayGroupId} Allows Arbitrary Scheduling Criteria Injection to Player Devices
New
4.3
CVSS
–
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XI
xibo-cms · xibosignage
< 4.4.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-50543
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-50543
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/pull/3488
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
github.com
https://github.com/xibosignage/xibo-cms/security/advisories/GHSA-737f-mfxg-jv9q
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