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Security Advisories: GSA_kwCzR0hTQS1ycnFmLXc3NGotMjRmZs4AA_S9

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

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Permalink: https://github.com/advisories/GHSA-rrqf-w74j-24ff
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1ycnFmLXc3NGotMjRmZs4AA_S9
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 3 months ago
Updated: about 2 months ago

CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Identifiers: GHSA-rrqf-w74j-24ff, CVE-2024-45399
References:

Repository: https://github.com/indico/indico
Blast Radius: 6.1

Affected Packages

pypi:indico

Dependent packages: 21
Dependent repositories: 10
Downloads: 3,454 last month
Affected Version Ranges: < 3.3.4
Fixed in: 3.3.4
All affected versions: 0.98.0, 0.98.1, 0.98.2, 1.1.1, 1.1.2, 1.2.1, 1.2.2, 2.0.1, 2.0.2, 2.0.3, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.1.7, 2.1.8, 2.1.9, 2.1.10, 2.1.11, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6, 2.2.7, 2.2.8, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 3.0.1, 3.0.2, 3.0.3, 3.1.1, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.3.1, 3.3.2, 3.3.3
All unaffected versions: 3.3.4