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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (8.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Cern Indico
- Indico — versions < 3.3.8
Weakness classification (CWE)
References
- github.com/indico/indico/security/advisories/GHSA-7cf7-9wrr-vrf4 (Patch, Vendor Advisory)
- github.com/indico/indico/releases/tag/v3.3.8 (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.