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CVE-2026-85230— MISP Dashboard Button Widget Allows Persistent JavaScript URL Injection

Quick assessment

Affected
misp misp
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.

MISP是MISP组织开源的一套开源的软件解决方案。该产品用于收集、存储、分发、共享网络安全指标,并具有威胁网络安全事件分析和恶意软件分析等功能。 MISP 2.5.45及之前版本存在安全漏洞，该漏洞源于MISP dashboard ButtonWidget配置在保存时未对URL进行验证，仅渲染时验证，可能允许经过身份验证的用户持久化包含javascript:协议的任意URL，导致在MISP安全上下文中执行客户端脚本，从而以受影响用户权限执行操作或访问会话信息。

CVSS 5.3 · Medium EPSS 0.29% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.5.45 affected
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I. Basic Information for CVE-2026-85230

Vulnerability Information
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Vulnerability Title
MISP Dashboard Button Widget Allows Persistent JavaScript URL Injection
Source: CVE Program / CVE List V5
Vulnerability Description
A persistent unsafe URL injection vulnerability exists in the MISP dashboard ButtonWidget configuration. Dashboard widget URLs were validated only when the widget was rendered and were not validated when the configuration was saved. As a result, an authenticated user able to modify dashboard widget settings could persist arbitrary URL values, including URLs using the javascript: scheme, through either of the dashboard settings persistence paths. A malicious javascript: URL stored in a dashboard button could potentially result in client-side script execution in the MISP security context if the value reached a rendering or navigation path without the existing runtime validation. Such execution could allow an attacker to perform actions with the privileges of the affected user or access information available to their MISP session. The practical exploitability of this issue is reduced by the fact that MISP already applied URL validation at render time, which neutralized known malicious values before they were presented to the user. The vulnerability therefore represents a persistence-layer validation gap and a defense-in-depth weakness rather than evidence of a direct bypass of the existing rendering protection. The patch introduces a canonical url schema type and validates dashboard widget configuration before it is persisted through either settings save mechanism. ButtonWidget URLs must now be strings resolving to an absolute path on the current MISP instance or a full URL with the same origin. Values using javascript:, external origins, malformed URL forms, and non-string values are rejected at save time.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/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
Vulnerability Title
MISP 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MISP是MISP组织开源的一套开源的软件解决方案。该产品用于收集、存储、分发、共享网络安全指标,并具有威胁网络安全事件分析和恶意软件分析等功能。 MISP 2.5.45及之前版本存在安全漏洞，该漏洞源于MISP dashboard ButtonWidget配置在保存时未对URL进行验证，仅渲染时验证，可能允许经过身份验证的用户持久化包含javascript:协议的任意URL，导致在MISP安全上下文中执行客户端脚本，从而以受影响用户权限执行操作或访问会话信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
misp misp 0 ~ 2.5.45 -

II. Public POCs for CVE-2026-85230

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III. Intelligence Information for CVE-2026-85230

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Patches & Fixes for CVE-2026-85230 (1)

Same Patch Batch · misp · 2026-09-03 · 9 CVEs total

CVE-2026-85216 9.5 CRITICAL MISP LDAP and LinOTP Authentication Bypass via Empty or Invalid Credentials
CVE-2026-85236 8.8 HIGH MISP cullEmptyEvents CSRF Allows Irreversible Deletion of Events via GET Request
CVE-2026-85237 8.6 HIGH Missing Rate Limiting in Email OTP Verification Allows Brute-Force Authentication Bypass
CVE-2026-85221 7.6 HIGH MISP CurlClient TLS Peer Verification Disabled by Default Enables Man-in-the-Middle Attack
CVE-2026-85238 7.6 HIGH Session Fixation in MISP CustomAuth Authentication Allows Session Hijacking
CVE-2026-85239 7.1 HIGH MISP Event Template Definition Validation Bypass Allows Persistent Denial of Service
CVE-2026-85227 6.1 MEDIUM Reflected Cross-Site Scripting in MISP Event Filtering via taggedAttributes and galaxyAtta
CVE-2026-85226 5.3 MEDIUM MISP OnDemand Correlation Engine Missing Access Control Allows Disclosure of Restricted Co

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-85230

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