Indico vulnerable to Cross-Site-Scripting via confirmation prompts
Impact
There is a Cross-Site-Scripting vulnerability in confirmation prompts commonly used when deleting content from Indico. Exploitation requires someone with at least submission privileges (such as a speaker) and then someone else to attempt to delete this content.
Considering that event organizers may want to delete suspicious-looking content when spotting it, there is a non-negligible risk of such an attack to succeed. The risk of this could be further increased when combined with some some social engineering pointing the victim towards this content.
Patches
You need to update to Indico 3.2.6 as soon as possible. See the docs for instructions on how to update.
Workarounds
Only let trustworthy users manage categories, create events or upload materials ("submission" privileges on a contribution/event). This should already be the case in a properly-configured setup when it comes to category/event management.
Note that a conference doing a Call for Abstracts actively invites external speakers (who the organizers may not know and thus cannot fully trust) to submit content, hence the need to update to a a fixed version ASAP in particular when using such workflows.
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
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | indico | < 3.2.6 | 3.2.6 |
References
- https://github.com/indico/indico/security/advisories/GHSA-fmqq-25x9-c6hm
- https://github.com/indico/indico/commit/2ee636d318653fb1ab193803dafbfe3e371d4130
- https://github.com/indico/indico/releases/tag/v3.2.6
- https://docs.getindico.io/en/stable/installation/upgrade/
- https://nvd.nist.gov/vuln/detail/CVE-2023-37901
- https://docs.getindico.io/en/stable/installation/upgrade
- https://github.com/indico/indico
- https://github.com/pypa/advisory-database/tree/main/vulns/indico/PYSEC-2023-129.yaml
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Python (PyPI)
- Package
indico- Disclosed
- 21.07.2023
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2023-129 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-fmqq-25x9-c6hm - CC BY 4.0
Vulnerability history: indico
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 16
- First → latest
- 10.2019 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 13
Disclosures per year
- 2019: 1
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 1
- 2024: 1
- 2025: 4
- 2026: 8
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Indico vulnerable to Cross-Site-Scripting via confirmation prompts this entry
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