What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-28 · updated 2026-10-29
• Weakness: CWE-862

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.

Affected products

• xibosignage xibo-cms: before 4.4.3

References

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

Get alerted when CVE-2026-50543 or the next vulnerability affects your stack