# CVE-2026-25739: Indico Affected by Cross-Site-Scripting via material uploads

Source: https://junglewise.ai/threats/cve-2026-25739-indico-affected-by-cross-site-scripting-via-material-uploads  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-19  
License: CC BY 4.0 with a link back

CVE-2026-25739 · Severity: low · CVSS 3.1 · Published 2026-02-19

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Versions prior to 3.3.10 are vulnerable to cross-site scripting when uploading certain file types as materials. Users should upgrade to version 3.3.10 to receive a patch. To apply the fix itself updating is sufficient, but to benefit from the strict Content Security Policy (CSP) Indico now applies by default for file downloads, update the webserver config in case one uses nginx with Indico's `STATIC_FILE_METHOD` set to `xaccelredirect`. For further directions, consult the GitHub Security advisory or Indico setup documentation. Some workarounds are available. Use the webserver config to apply a strict CSP for material download endpoints, and/or only let trustworthy users create content (including material uploads, which speakers can typically do as well) on Indico.

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

## Quick answers

**Is CVE-2026-25739 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-25739 being exploited in the wild.

**How severe is CVE-2026-25739?** Low severity, with a CVSS score of 3.1, published 19 February 2026.

**Which products and versions are affected?** indico (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.10.

**Is there a fix for CVE-2026-25739?** Yes. indico (PyPI): upgrade to 3.3.10 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-25739?** 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 3.3.10 or later

  ```sh
  pip install "indico>=3.3.10"
  ```


## Affected products

- indico (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.10

## Identifiers

- CVE-2026-25739
- GHSA-jxc4-54g3-j7vp
- PYSEC-2026-2182

## 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)