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CVE-2026-81814— Flowintel Stored XSS in Calendar via Malicious Case Title

Quick assessment

Affected
flowintel flowintel
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.

受影响的 Flowintel 版本使用 渲染日历事件标题。由于这些标题源自案例标题，能够创建或修改案例标题的用户可以存储包含 HTML 或脚本的内容，当其他用户查看日历时，浏览器会解释执行这些内容。 修复方式如下： 将： 改为： 同时，对于静态下载图标也不再使用 。 受影响版本：大于等于 3.3.0

CVSS 5.1 · Medium

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-81814

Vulnerability Information
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Vulnerability Title
Flowintel Stored XSS in Calendar via Malicious Case Title
Source: CVE Program / CVE List V5
Vulnerability Description
Affected versions of Flowintel render calendar event titles using innerHTML. Because those titles are derived from case titles, a user able to create or modify a case title could store HTML or script-capable content that is later interpreted by the browser when another user views the calendar. The fix changes: titleEl.innerHTML = arg.event.title to: titleEl.textContent = arg.event.title || '' and similarly stops using innerHTML for the static download icon. Version impacted =>3.3.0
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
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
flowintel flowintel 0 ~ 3.3.0 -

II. Public POCs for CVE-2026-81814

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III. Intelligence Information for CVE-2026-81814

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Patches & Fixes for CVE-2026-81814 (1)

Same Patch Batch · flowintel · 2026-08-27 · 11 CVEs total

CVE-2026-81826 9.1 CRITICAL Flowintel Fails to Invalidate Active Sessions After Password Change
CVE-2026-81662 8.6 HIGH Flowintel Alert Settings Configuration Allows Remote Code Execution via Arbitrary Configur
CVE-2026-81818 8.6 HIGH Flowintel Organization Administrator Can Reset Full Administrator Password and Escalate Pr
CVE-2026-81743 7.5 HIGH Flowintel Arbitrary Log File Path Allows Remote Code Execution via Template Injection
CVE-2026-81817 7.2 HIGH Flowintel Missing Task-to-Case Authorization Allows Cross-Case Task Modification
CVE-2026-81659 7.1 HIGH Flowintel Note PDF Export Allows Arbitrary Local File Read via Pandoc/XeLaTeX Processing
CVE-2026-81827 6.9 MEDIUM Flowintel Login Email Validation Bypass Allows Log Injection via Crafted Email Input
CVE-2026-81819 5.3 MEDIUM Flowintel Missing Authorization Allows Regular API Users to View Other Users’ Task Assignm
CVE-2026-81753 5.1 MEDIUM Flowintel Stored XSS in Case Notes via Malicious Mermaid Diagram Content
CVE-2026-81820 5.1 MEDIUM Flowintel HTML Injection in MISP Case History Timeline via Crafted Object Attributes

IV. Related Vulnerabilities

Same product: flowintel
Same vendor: flowintel
Same weakness: CWE-79

V. Comments for CVE-2026-81814

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