What is CVE-2025-59034?

CVE-2025-59034 is a medium-severity vulnerability in Cern Indico, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2025-09-10.

How severe is CVE-2025-59034?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Cern Indico

CVE-2025-59034

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to version 3.3.8, a legacy API to retrieve user details could be misused to retrieve profile details of other users without having admin permissions due to a broken access check. Users should to update to Indico 3.3.8 as soon as possible. As a workaround, it is possible to restrict access to the affected API (e.g. in the webserver config).

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.002 (14.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Cern Indico
Indico — versions < 3.3.8

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2025-59034?: CVE-2025-59034 is a medium-severity vulnerability in Cern Indico, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2025-09-10.
How severe is CVE-2025-59034?: Medium severity. CVSS v3 base score is 4.3 out of 10.