Improper Restriction of Excessive Authentication Attempts in FacturaScripts - #VU163126
Published: November 9, 2026
Vulnerability identifier: #VU163126
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-307
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to bypass IP-based rate limiting in FacturaScripts for cross-account password spraying and API brute force.
The vulnerability exists due to client IP resolution trusting attacker-controlled X-Forwarded-For or CF-Connecting-IP headers without validating a trusted proxy when processing authentication requests. An unauthenticated remote attacker can rotate forged IP headers between attempts to evade IP counters, while login attempts remain subject to per-username limits.
Affected software
FacturaScripts
Remediation
Install security update from vendor's website.
FacturaScripts - update to 2026.7