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CVE-2026-105090

Quick assessment

Affected
Formbricks Formbricks
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.

Formbricks 5.4.4 之前版本以及 6.0.1 之前版本存在存储型跨站脚本（XSS）漏洞。调查表级别的“自定义 Head 脚本”功能未正确实施文档中规定的“管理”权限边界。持有“读写”权限的工作区成员即可在调查表中配置自定义 Head 脚本，而该操作根据文档规定仅限“管理”角色执行。由于配置的脚本会在任何打开该受影响调查表的已认证浏览器会话中执行，低权限成员因此可以在高权限用户的会话中运行任意 JavaScript 代码（即存储型跨站脚本）。修复后的版本要求修改调查表自定义 Head 脚本必须具有“管理

CVSS 5.1 · Medium
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I. Basic Information for CVE-2026-105090

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Formbricks before 5.4.4 and 6 before 6.0.1 allows stored XSS. The survey-level Custom Head Scripts feature did not enforce the documented Manage permission boundary. A workspace member holding only readWrite permission could configure Custom Head Scripts on a survey, an operation the documentation restricts to the Manage role. Because the configured scripts execute in the authenticated browser session of any user who opens the affected survey, a lower-privileged member can run arbitrary JavaScript (stored cross-site scripting) in the session of higher-privileged users. Fixed versions require Manage access to modify survey Custom Head Scripts.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Formbricks Formbricks 0 ~ 5.4.4 -

II. Public POCs for CVE-2026-105090

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III. Intelligence Information for CVE-2026-105090

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Patches & Fixes for CVE-2026-105090 (1)

Vendor Pages for CVE-2026-105090 (2)

Other References for CVE-2026-105090 (1)

IV. Related Vulnerabilities

Same product: Formbricks
Same vendor: Formbricks
Same weakness: CWE-863

V. Comments for CVE-2026-105090

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