Auth bypass in Cern Indico

CVE-2025-53640

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 (suc…

Vulnerability class: Information Disclosure

EPSS: 0.006 (42.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-53640?
CVE-2025-53640 is a medium-severity vulnerability in Cern Indico, classified under Information Disclosure. CVSS score: 6.5/10. Published 2025-07-14.
How severe is CVE-2025-53640?
Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-53640 known to be exploited?
3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.