Indico vulnerable to Cross-Site-Scripting via confirmation prompts

Exploitation

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

CVSS 4.0

5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N · score source

EPSS

• CVE-2023-37901: 0.52% estimated exploitation activity in the next 30 days; percentile 44.01 (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 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…

Published by the source

21 Jul 2023, 20:24 UTC

Last modified by the source

23 Sep 2024, 17:08 UTC

Source last checked

26 Oct 2026, 13:17 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-fmqq-25x9-c6hm

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-fmqq-25x9-c6hm

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# Patch Next advisory brief: CVE-2023-37901

Advisory: Indico vulnerable to Cross-Site-Scripting via confirmation prompts
IDs: CVE-2023-37901, GHSA-fmqq-25x9-c6hm
Record: https://patchnext.com/advisories/cve-2023-37901 (revision 3, source checked 26 Oct 2026, 13:17 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: indico 3.2.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI indico: affected < 3.2.6; fixed in 3.2.6

## 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://osv.dev/vulnerability/GHSA-fmqq-25x9-c6hm (OSV record GHSA-fmqq-25x9-c6hm lists affected ranges: PyPI indico >=0 <3.2.6 (fixed))
- Verified: https://github.com/advisories/GHSA-fmqq-25x9-c6hm (GitHub-reviewed advisory GHSA-fmqq-25x9-c6hm lists affected ranges: PyPI indico >=0 <3.2.6)

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