CVE-2025-53640
Indico vulnerable to user enumeration via API endpoint
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 14, 2025
- Updated
- Jul 22, 2025
- Reserved
- Jul 7, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
indicoindico |
|
References
- https://github.com/indico/indico/security/advisories/GHSA-q28v-664f-q6wj
- https://docs.getindico.io/en/stable/config/settings/#ALLOW_PUBLIC_USER_SEARCH
- https://docs.getindico.io/en/stable/installation/upgrade
- https://github.com/indico/indico/releases/tag/v3.3.7
- https://www.vicarius.io/vsociety/posts/cve202553640-detect-indico-vulnerability
- https://www.vicarius.io/vsociety/posts/cve202553640-mitigate-indico-vulnerability
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.