CRITICAL

CVE-2026-100717

froxlor before 2.3.12 CRLF Injection via validateUrl userinfo

CVSS v3

9.9

CRITICAL

EPSS Score

—

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

froxlor is a server administration panel. In versions 2.3.10 and earlier, Validate::validateUrl rejects carriage return and line feed characters only in the path, query and fragment components returned by parse_url, and never inspects the userinfo (user:pass@) components. This is an incomplete fix for GHSA-c3p2. An authenticated low-privilege customer with subdomain-create rights (no admin or change_serversettings privilege required) can supply a subdomain redirect URL that carries a CR/LF paylo

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
Published: 2026-09-26
Last Modified: 2026-09-26

Frequently asked questions

What is CVE-2026-100717?

Is CVE-2026-100717 actively exploited?

Active exploitation of CVE-2026-100717 has not been confirmed.

What is the CVSS score for CVE-2026-100717?

CVE-2026-100717 has a CVSS v3 base score of 9.9 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H.

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