# CVE-2024-45399: Indico has a Cross-Site-Scripting during account creation

Source: https://junglewise.ai/threats/cve-2024-45399-indico-has-a-cross-site-scripting-during-account-creation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-09-04  
License: CC BY 4.0 with a link back

CVE-2024-45399 · Severity: low · CVSS 3.1 · Published 2024-09-04

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:`.

Technologies: [indico (PyPI)](https://junglewise.ai/threats/technologies/indico). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2024-45399 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-45399 being exploited in the wild.

**How severe is CVE-2024-45399?** Low severity, with a CVSS score of 3.1, published 4 September 2024.

**Which products and versions are affected?** indico (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.4, GIT:introduced=0,fixed=0bdcf656d469e5f675cb56fd644d82fea3a97c2a|GIT:introduced=0,fixed=7dcb573837b9fd09d95f74d1baeae225b164cc8f|ECOSYSTEM:introduced=0,fixed=3.3.4.

**Is there a fix for CVE-2024-45399?** Yes. indico (PyPI): upgrade to 3.3.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2024-45399?** Check whether you run indico (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- indico (PyPI): upgrade to 3.3.4 or later

  ```sh
  pip install "indico>=3.3.4"
  ```


## Affected products

- indico (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.4, GIT:introduced=0,fixed=0bdcf656d469e5f675cb56fd644d82fea3a97c2a|GIT:introduced=0,fixed=7dcb573837b9fd09d95f74d1baeae225b164cc8f|ECOSYSTEM:introduced=0,fixed=3.3.4

## Identifiers

- CVE-2024-45399
- GHSA-rrqf-w74j-24ff
- PYSEC-2024-90

## Related threats

- [Indico Cross-Site-Scripting in minutes editor](https://junglewise.ai/threats/cve-2026-107397-indico-cross-site-scripting-in-minutes-editor)
- [Indico cross-site scripting in link fields](https://junglewise.ai/threats/cve-2026-107396-indico-cross-site-scripting-in-link-fields)
- [Indico missing access check in legacy session export API](https://junglewise.ai/threats/cve-2026-107395-indico-missing-access-check-in-legacy-session-export-api)
- [Indico incomplete SSRF check in URL validation](https://junglewise.ai/threats/cve-2026-107394-indico-incomplete-server-side-request-forgery-ssrf-check)
- [PYSEC-2026-1461 - Indico vulnerable to Cross-Site Scripting via LaTeX math code](https://junglewise.ai/threats/cve-2025-59035-indico-vulnerable-to-cross-site-scripting-via-latex-math-code)