CVE-2026-107397: Indico: Cross-Site-Scripting in minutes editor

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-08 · updated 2026-10-13
Weakness: CWE-79

Description

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can create content, including speakers who can create minutes, can store crafted HTML in event minutes. When concurrent edits are made to the same minutes, the minute editor conflict UI can execute attacker-controlled script in the viewer's browser in the Indico origin. This issue is fixed in version 3.3.13.

Affected products

indico: before 3.3.13

References

https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18
https://github.com/indico/indico/pull/7619
https://github.com/indico/indico/releases/tag/v3.3.13
https://github.com/indico/indico/security/advisories/GHSA-cw24-x4mj-fw3q

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