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GHSA-rrqf-w74j-24ff
No affected components available
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-multipassdependency to>=0.5.5which fixes the vulnerability. You would do that by editingrequirements.txtbefore 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
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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