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I. Basic Information for CVE-2025-53640
Vulnerability Information

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Vulnerability Title
Indico vulnerable to user enumeration via API endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Starting in version 2.2 and prior to version 3.3.7, an endpoint used to display details of users listed in certain fields (such as ACLs) could be misused to dump basic user details (such as name, affiliation and email) in bulk. Version 3.3.7 fixes the issue. Owners of instances that allow everyone to create a user account, who wish to truly restrict access to these user details, should consider restricting user search to managers. As a workaround, it is possible to restrict access to the affected endpoints (e.g. in the webserver config), but doing so would break certain form fields which could no longer show the details of the users listed in those fields, so upgrading instead is highly recommended.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Indico 安全漏洞
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 3.3.7之前版本存在安全漏洞,该漏洞源于Flask-Multipass存在用户详细信息泄露。
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
VendorProductAffected VersionsCPESubscribe
indicoindico >= 2.2, < 3.3.7 -
II. Public POCs for CVE-2025-53640
#POC DescriptionSource LinkShenlong Link
1Broken Object Level Authorization (BOLA) in CERN's Indico leads to authenticated user enumeration.https://github.com/rafaelcorvino1/CVE-2025-53640POC Details
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III. Intelligence Information for CVE-2025-53640
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IV. Related Vulnerabilities
V. Comments for CVE-2025-53640

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