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
- Cern Indico
- Indico — versions >= 2.2, < 3.3.7
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mitigation, Third Party Advisory)
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.