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CVE-2026-25739— Indico affected by Cross-Site-Scripting via material uploads

Quick assessment

Affected
indico indico
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.

Indico是Indico开源的一个功能丰富的事件管理系统。 Indico 3.3.10之前版本存在跨站脚本漏洞，该漏洞源于上传某些文件类型时处理不当，可能导致跨站脚本攻击。

CVSS 5.4 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-25739

Vulnerability Information
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Vulnerability Title
Indico affected by Cross-Site-Scripting via material uploads
Source: CVE Program / CVE List V5
Vulnerability Description
Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Versions prior to 3.3.10 are vulnerable to cross-site scripting when uploading certain file types as materials. Users should upgrade to version 3.3.10 to receive a patch. To apply the fix itself updating is sufficient, but to benefit from the strict Content Security Policy (CSP) Indico now applies by default for file downloads, update the webserver config in case one uses nginx with Indico's `STATIC_FILE_METHOD` set to `xaccelredirect`. For further directions, consult the GitHub Security advisory or Indico setup documentation. Some workarounds are available. Use the webserver config to apply a strict CSP for material download endpoints, and/or only let trustworthy users create content (including material uploads, which speakers can typically do as well) on Indico.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Vulnerability Title
Indico 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Indico是Indico开源的一个功能丰富的事件管理系统。 Indico 3.3.10之前版本存在跨站脚本漏洞，该漏洞源于上传某些文件类型时处理不当，可能导致跨站脚本攻击。
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
indico indico < 3.3.10 -

II. Public POCs for CVE-2026-25739

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III. Intelligence Information for CVE-2026-25739

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IV. Related Vulnerabilities

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

V. Comments for CVE-2026-25739

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