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CVE-2026-100716— Froxlor before 2.3.12 Privilege Escalation via Symlink

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，客户数据导出（DataDump）定时任务未能对导出目标路径的中间路径组件进行有效验证： 在遍历路径组件时存在一个“差一”（off-by-one）错误，导致跳过了客户主目录下的首个路径段；而 中的防护措施仅使用 检查了最终路径组件。若一个已认证的客户账户启用了导出功能，该用户可将导出目的地设置为自身网络空间内的真实子目录，随后在受权限保护的 root 用户定时任务执行前，将某个中间路径组件替换为符号链接。定时任务中使用的 命令会递归地将该符号链接所

CVSS 9.9 · Critical EPSS 0.39% · P31
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I. Basic Information for CVE-2026-100716

Vulnerability Information
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Vulnerability Title
Froxlor before 2.3.12 Privilege Escalation via Symlink
Source: CVE Program / CVE List V5
Vulnerability Description
Froxlor is a server administration panel. In versions 2.3.10 and earlier, the customer data-export (DataDump) cron fails to validate intermediate path components of the export destination: Froxlor\FileDir::makeCorrectDir() contains an off-by-one in its path-component walk that skips the first segment below the customer home directory, and the guard in ExportCron.php checks only the final component with is_link(). An authenticated customer whose account has the export feature enabled can schedule an export into a genuine subdirectory of their own webspace, then replace an intermediate path component with a symlink before the root-owned cron runs. The cron's `chown -R` then recursively changes ownership of the linked directory tree — for example /etc — to the customer's UID, yielding host root and cross-tenant compromise. Exploitation is deterministic and requires no race. This is an incomplete fix of GHSA-75h4-... The issue is fixed in Froxlor 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:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
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-2026-100716

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III. Intelligence Information for CVE-2026-100716

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Vendor Advisories for CVE-2026-100716 (1)

Other References for CVE-2026-100716 (1)

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

CVE-2026-100717 9.9 CRITICAL froxlor before 2.3.12 CRLF Injection via validateUrl userinfo
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-59

V. Comments for CVE-2026-100716

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