Quick answers
- Is CVE-2026-111048 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111048 being exploited in the wild.
- How severe is CVE-2026-111048?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- FOSSBilling 0.1.0 to 0.8.8.
- Is there a fix for CVE-2026-111048?
- Yes: fixed in 0.8.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-111048 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-111048?
- Check whether you run FOSSBilling at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 0.8.9
Technical details
The admin/support/note_create endpoint accepts and stores the note parameter without HTML sanitization in the support_ticket_note table. The admin ticket list template renders stored notes via innerHTML, allowing stored cross-site scripting (XSS). A staff user with support.manage_tickets permission can craft JavaScript payloads that execute in the browser of any staff member viewing the ticket, with access to that viewer's session privileges, CSRF tokens, and ability to read client or invoice data. The fix sanitizes notes as plain text on storage and renders them as text nodes instead of innerHTML to prevent both new and previously stored XSS payloads.
Affected products
- FOSSBilling FOSSBilling 0.1.0 to 0.8.8
Timeline
- 2026-11-02: disclosed