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CVE-2026-100720— Froxlor before 2.3.12 Stored XSS via SSL certificate issuer

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 2.0.0 至 2.3.10 版本存在存储型跨站脚本（XSS）漏洞。当客户（权限最低的认证角色）为其域名之一上传 SSL 证书时，Certificates API 的 add()/update() 方法会使用 openssl_x509_parse() 解析该证书，并将颁发机构组织字段（issuer['O']）的值未经任何 sanitization（清理/转义）地直接存储。随后，Froxlor 的表格列表渲染器通过 Twig 的 过滤器输出标量单元格，从而禁用了 HTML 自动转义机制。因此，当管理员

CVSS 8.7 · High EPSS 0.21% · P11
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I. Basic Information for CVE-2026-100720

Vulnerability Information
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Vulnerability Title
Froxlor before 2.3.12 Stored XSS via SSL certificate issuer
Source: CVE Program / CVE List V5
Vulnerability Description
Froxlor 2.0.0 through 2.3.10 is vulnerable to stored cross-site scripting. When a customer (the lowest-privileged authenticated role) uploads an SSL certificate for one of their own domains, the Certificates API add()/update() methods parse it with openssl_x509_parse() and store the issuer organization (issuer['O']) value verbatim without sanitization. Froxlor's table-listing renderer then emits scalar cells through Twig's `raw` filter, disabling HTML auto-escaping, so when an administrator or reseller opens Domains > SSL certificates the attacker-supplied issuer value executes as script in the privileged user's session. This crosses a privilege boundary from customer to admin and can result in full administrator account takeover; because a Froxlor admin controls webserver, DNS, and PHP configuration applied by a cron job running as root, the issue can be further escalated to command execution as root on the managed server. 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:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
froxlor froxlor 2.0.0 ~ 2.3.12 -

II. Public POCs for CVE-2026-100720

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III. Intelligence Information for CVE-2026-100720

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Vendor Advisories for CVE-2026-100720 (1)

Other References for CVE-2026-100720 (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-2026-100716 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-2026-100713 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-79

V. Comments for CVE-2026-100720

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