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CVE-2026-100717— froxlor before 2.3.12 CRLF Injection via validateUrl userinfo

Quick assessment

Affected
froxlor froxlor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Froxlor 是一款服务器管理面板。在 2.3.10 及更早版本中， 函数仅对 返回的路径（path）、查询字符串（query）和片段（fragment）组件中的回车符（CR）和换行符（LF）进行过滤，而从未检查 userinfo（即 ）部分。这是对 GHSA-c3p2 漏洞的不完整修复。 具有子域名创建权限的低权限已认证客户（无需管理员权限或更改服务器设置的权限）可以提供一个带有 CR/LF 载荷的 userinfo 部分的子域名重定向 URL（例如： ）。该值能够通过验证，并成功通过 IDNA 编码处理，最终

CVSS 9.9 · Critical EPSS 0.30% · P20
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I. Basic Information for CVE-2026-100717

Vulnerability Information
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Vulnerability Title
froxlor before 2.3.12 CRLF Injection via validateUrl userinfo
Source: CVE Program / CVE List V5
Vulnerability 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 payload in the userinfo portion (e.g. http://user%0areturn 200 "pwned";%0a@evil.com/). The value passes validation, survives IDNA encoding, and is written verbatim into the generated nginx or Apache vhost configuration, allowing the attacker to break out of the emitted directive and inject arbitrary web-server configuration lines. froxlor regenerates and reloads the web-server configuration as root, so the injected directives take effect server-wide and can hijack responses or read local files. The issue is fixed in version 2.3.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
froxlor froxlor 0 ~ 2.3.12 -

II. Public POCs for CVE-2026-100717

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III. Intelligence Information for CVE-2026-100717

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Vendor Advisories for CVE-2026-100717 (1)

Other References for CVE-2026-100717 (1)

Same Patch Batch · froxlor · 2026-09-26 · 13 CVEs total

CVE-2026-100716 9.9 CRITICAL Froxlor before 2.3.12 Privilege Escalation via Symlink
CVE-2026-100715 9.6 CRITICAL Froxlor before 2.3.12 Arbitrary File Deletion via Symlink
CVE-2026-100714 9.1 CRITICAL Froxlor before 2.3.12 Command Injection via letsencryptchallengepath
CVE-2026-100720 8.7 HIGH Froxlor before 2.3.12 Stored XSS via SSL certificate issuer
CVE-2026-100713 7.8 HIGH Froxlor before 2.3.12 Privilege Escalation via SSH Key Sync
CVE-2026-100711 7.5 HIGH froxlor before 2.3.12 Authentication Bypass via Session Persistence
CVE-2026-100709 7.5 HIGH Froxlor before 2.3.12 2FA Bypass via Namespace Confusion
CVE-2026-100718 7.1 HIGH Froxlor before 2.3.12 Authentication Bypass via EmailSender.add
CVE-2026-100708 7.1 HIGH Froxlor before 2.3.13 Private Key Disclosure via Certificates API
CVE-2026-100712 6.5 MEDIUM froxlor before 2.3.12 Two-Factor Authentication Bypass via CSRF
CVE-2026-100719 6.5 MEDIUM Froxlor before 2.3.12 Credential Disclosure via DirProtections API
CVE-2026-100710 4.9 MEDIUM Froxlor before 2.3.12 DKIM Private Key Disclosure via API

IV. Related Vulnerabilities

Same product: froxlor
Same vendor: froxlor
Same weakness: CWE-93

V. Comments for CVE-2026-100717

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