CVE-2024-45399: Indico has a Cross-Site-Scripting during account creation
Impact There is a Cross-Site-Scripting vulnerability during account creation when redirecting after the account has been successfully created. Exploitation requires the user to initiate the account creation process with a maliciously crafted link, and then finalize the signup process. Because of this, it can only target newly created (and thus unprivileged) Indico users so the benefits of exploiting it are very limited.
Patches You should to update to Indico 3.3.4 as soon as possible. See the docs for instructions on how to update.
Workarounds - If you build the Indico package yourself and cannot upgrade for some reason, you can simply update the flask-multipass dependency to >=0.5.5 which fixes the vulnerability. You would do that by editing requirements.txt before building the package (see commit 7dcb573837), or possibly cherry-picking that particular commit. - Otherwise you could configure your web server to disallow requests containing a query string with a parameter that starts with javascript:
For more information If you have any questions or comments about this advisory:
- Open a thread in our forum - Email us privately at indico-team@cern.ch
Other sources
Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. In Indico prior to version 3.3.4, corresponding to Flask-Multipass prior to version 0.5.5, there is a Cross-Site-Scripting vulnerability during account creation when redirecting to the next URL. Exploitation requires initiating the account creation process with a maliciously crafted link, and then finalizing the signup process. Because of this, it can only target newly created (and thus unprivileged) Indico users. Indico 3.3.4 upgrades the dependency on Flask-Multipass to version 0.5.5, which fixes the issue. Those who build the Indico package themselves and cannot upgrade can update the flask-multipass dependency to >=0.5.5 which fixes the vulnerability. Otherwise one could configure one's web server to disallow requests containing a query string with a next parameter that starts with javascript:.
— NVD
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-45399?
CVE-2024-45399 is classified as a Cross-Site-Scripting vulnerability with moderate severity that affects the Indico software during account creation.
How do I fix CVE-2024-45399?
To fix CVE-2024-45399, upgrade to Indico version 3.3.5 or higher, which includes the necessary security patches.
What software is affected by CVE-2024-45399?
CVE-2024-45399 affects Indico versions prior to 3.3.5 when used on CERN Indico software.
Who can exploit CVE-2024-45399?
CVE-2024-45399 can be exploited by any user who is directed to the vulnerable account creation process via a maliciously crafted link.
What attack vector is used in CVE-2024-45399?
The attack vector for CVE-2024-45399 involves Cross-Site-Scripting during the redirection process following account creation.