CVE-2026-31953 Xibo CMS has Stored XSS via Notification Body with Zero-Click Execution on Login
Authenticated users with notification privileges can inject JavaScript that executes on victim login, enabling session hijacking or malicious actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-31953?
CVE-2026-31953 is a medium-severity cross-site scripting vulnerability in xibosignage xibo-cms, published on 24 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Xibo is an open source digital signage platform with a web content management system and Windows display player software. A stored Cross-Site Scripting (XSS) vulnerability in versions prior to 4.4.1 allows an authenticated user with notification creation permissions to inject arbitrary JavaScript into the notification body. When the notification is set as an "interrupt," the payload executes automatically in the browser of any targeted user upon login, requiring zero user interaction. Exploitation of the vulnerability is possible on behalf of an authorized user who has both of the following privileges, which are not granted to non-admins as standard: Access to the Notification Centre to view past notifications, and include "Add Notification" button to allow for the creation of new notifications. Users should upgrade to version 4.4.1 which fixes this issue. Upgrading to a fixed version is necessary to remediate. Users unable to upgrade should revoke such privileges from users they do not trust.
Weakness: CWE-79
Which versions are affected by CVE-2026-31953?
It affects 1 product.
Products include Xibosignage Xibo.
How do I fix CVE-2026-31953?
No fix has been published for CVE-2026-31953 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-31953 being exploited?
There is no known exploitation of CVE-2026-31953 in the wild and no public exploit code.
Other vulnerabilities in xibosignage xibo-cms
- CVE-2023-33177 Xibo CMS vulnerable to Remote Code Execution through Zip Slip
- CVE-2024-41802 Xibo allows Sensitive Information Disclosure abusing SQL Injection in Xibo CMS DataSet Data Import
- CVE-2026-31952 Xibo CMS API has SQL Injection via DataSet Filter Parameter
- CVE-2013-4887 SQL injection in n/a
- CVE-2025-62369 Xibo CMS: Remote Code Execution through module templates
Sources
Also known as GHSA-85w9-c833-q4w2.