XSS in Sysadminsmedia Homebox
CVE-2026-75599
HomeBox is a home inventory and organization system. Prior to 0.27.0, the maybeUrl() utility accepts markdown-style links in entity custom-field values without restricting the URL scheme, so an authenticated user can store a javascript: URI that is rendered as a clickable anchor on an item page. When another authenticated user clicks the link, attacker-controlled JavaScript executes in the victim's HomeBox origin, enabling session theft, account takeover, or data exfiltration. This issue is fixed in version 0.27.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Sysadminsmedia Homebox — versions < 0.27.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-75599?
- CVE-2026-75599 is a medium-severity vulnerability in Sysadminsmedia Homebox, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-11-05.
- How severe is CVE-2026-75599?
- Medium severity. CVSS v3 base score is 5.4 out of 10.