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CVE-2026-109307— Craft CMS 5.0.0 before 5.10.14 DOM XSS via returnUrl in 2FA Verification

Quick assessment

Affected
craftcms cms
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.

Craft CMS 5.0.0 至 5.10.14 版本中，存在一个基于 DOM 的跨站脚本（DOM-based XSS）漏洞，该漏洞出现在控制面板的登录和双因素认证（2FA）验证流程中。由于系统在前端导航时使用了用户可控的 参数，且该参数允许包含 协议类型的 URL，攻击者可构造恶意 URL（如 ），诱导启用了双因素认证的受害者在提交密码后、完成 TOTP 验证前访问该链接，从而在具有受害者权限的已认证控制面板环境中执行任意 JavaScript 代码。

CVSS 4.7 · Medium EPSS 0.18% · P8

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms cms 5.0.0< 5.10.14 affected
5.10.14 unaffected
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I. Basic Information for CVE-2026-109307

Vulnerability Information
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Vulnerability Title
Craft CMS 5.0.0 before 5.10.14 DOM XSS via returnUrl in 2FA Verification
Source: CVE Program / CVE List V5
Vulnerability Description
Craft CMS 5.0.0 before 5.10.14 contains a DOM-based cross-site scripting vulnerability in the control panel login and 2FA verification flow, where a user-controlled returnUrl accepting javascript: URLs is used in client-side navigation. Attackers can lure a 2FA-enabled victim into opening a crafted /admin/login?verify=1 URL between password submission and TOTP verification, executing JavaScript in the authenticated control panel with the victim's permissions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/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
craftcms cms 5.0.0 ~ 5.10.14 -

II. Public POCs for CVE-2026-109307

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III. Intelligence Information for CVE-2026-109307

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Vendor Advisories for CVE-2026-109307 (2)

Same Patch Batch · craftcms · 2026-10-12 · 5 CVEs total

CVE-2026-109308 8.8 HIGH Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 RCE via actionCacheUpdates Behavior
CVE-2026-109305 8.8 HIGH Craft CMS 5.10.2 before 5.10.14 Twig Sandbox Bypass RCE via has some/has every
CVE-2026-109306 5.9 MEDIUM Craft CMS 5.0.0 before 5.10.14 Missing Authorization via app/switch-to-licensed-edition
CVE-2026-109304 4.9 MEDIUM Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 Arbitrary File Read via Twig create

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-79

V. Comments for CVE-2026-109307

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