Auth bypass in Xibosignage Xibo
CVE-2026-31956
Xibo is an open source digital signage platform with a web content management system and Windows display player software. Prior to version 4.4.1, any authenticated user can manually construct a URL to preview campaigns/regions, and export saved reports belonging to other users. Exploitation of the vulnerability is possible on behalf of an authorized user who has any of the following privileges: Page which shows all Layouts that have been created for the purposes of Layout Management; page which shows all Campaigns that have been created for the purposes of Campaign Management; and page which shows all Reports that have been Saved. Users should upgrade to version 4.4.1 which fixes this issue. Upgrading to a fixed version is necessary to remediate.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Xibosignage Xibo
- Xibosignage Xibo-Cms — versions < 4.4.1
Weakness classification (CWE)
References
- github.com/xibosignage/xibo-cms/security/advisories/GHSA-q6rv-8hhj-3fr8 (Vendor Advisory)
- github.com/xibosignage/xibo-cms/releases/tag/4.4.1 (Release Notes)
Frequently asked questions
- What is CVE-2026-31956?
- CVE-2026-31956 is a medium-severity vulnerability in Xibosignage Xibo, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-04-24.
- How severe is CVE-2026-31956?
- Medium severity. CVSS v3 base score is 4.3 out of 10.