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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18
security-advisories@github.com
https://github.com/indico/indico/pull/7619
security-advisories@github.com
https://github.com/indico/indico/releases/tag/v3.3.13
security-advisories@github.com
https://github.com/indico/indico/security/advisories/GHSA-cw24-x4mj-fw3q
security-advisories@github.com