XSS in Cern Indico
CVE-2025-59035
Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to version 3.3.8, there is a Cross-Site-Scripting vulnerability when rendering LaTeX math code in contribution or abstract descriptions. Users should to update to Indico 3.3.8 as soon as possible. As a workaround, only let trustworthy users create content on Indico. Note that a conference doing a Call for Abstracts actively invites external speakers (who the organizers may not know and thus cannot fully trust) to submit content, hence the need to update to a a fixed version ASAP in particular when using such workflows.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (8.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.
Affected products
- Cern Indico
- Indico — versions < 3.3.8
Weakness classification (CWE)
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-2025-59035?
- CVE-2025-59035 is a medium-severity vulnerability in Cern Indico, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2025-09-10.
- How severe is CVE-2025-59035?
- Medium severity. CVSS v3 base score is 4.6 out of 10.