Indico: Cross-Site-Scripting in minutes editor

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

4.4 · CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2026-107397: 0.23% estimated exploitation activity in the next 30 days; percentile 14.26 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact There is a Cross-Site-Scripting vulnerability in the minute editor conflict UI tha's shown when concurrent edits are made to the same minutes in an event. Patches You should to update to Indico 3.3.13 as soon as possible. See the docs for instructions on how to update. Workarounds - Set CSPENABLED = True in indico.conf - this is recommended regardless of updating. - Only let trustworthy users create content (including minutes which speakers can typically do as well) on Indico. 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

Published by the source

8 Oct 2026, 22:09 UTC

Last modified by the source

15 Oct 2026, 14:56 UTC

Source last checked

26 Oct 2026, 13:55 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-cw24-x4mj-fw3q

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-cw24-x4mj-fw3q

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-cw24-x4mj-fw3q

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# Patch Next advisory brief: CVE-2026-107397

Advisory: Indico: Cross-Site-Scripting in minutes editor
IDs: CVE-2026-107397, GHSA-cw24-x4mj-fw3q
Record: https://patchnext.com/advisories/cve-2026-107397 (revision 3, source checked 26 Oct 2026, 13:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: indico 3.3.13. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI indico: affected < 3.3.13; fixed in 3.3.13

## Suggested inspection (read-only)
- `python -m pip show indico`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on indico.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-cw24-x4mj-fw3q (GitHub-reviewed advisory GHSA-cw24-x4mj-fw3q lists affected ranges: PyPI indico >=0 <3.3.13)
- Verified: https://osv.dev/vulnerability/GHSA-cw24-x4mj-fw3q (OSV record GHSA-cw24-x4mj-fw3q lists affected ranges: PyPI indico >=0 <3.3.13 (fixed))

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