Cross-site scripting in FacturaScripts - CVE-2026-42877
Published: November 9, 2026
Vulnerability identifier: #VU163104
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-42877
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an authenticated attacker to execute arbitrary JavaScript in another user's authenticated browser session.
The vulnerability exists due to insufficient JavaScript-context escaping of product references in FacturaScripts sales and purchases product search modals when a user clicks a crafted product. An authenticated attacker with warehouse product write access can store a malicious reference and cause an administrator who selects that product to perform unauthorized actions.
Affected software
FacturaScripts
How to mitigate CVE-2026-42877
Install security update from vendor's website.
FacturaScripts - update to 2026.1