Cross-site Scripting and Open Redirect in plone.app.contenttypes

Exploitation

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

CVSS

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

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Impact Plone is vulnerable to reflected cross site scripting and open redirect when an attacker can get a compromised version of the imageviewfullscreen page in a cache, for example in Varnish. The technique is known as cache poisoning. Any later visitor can get redirected when clicking on a link on this page. Usually only anonymous users are affected, but this depends on your cache settings. Patches New versions of plone.app.contenttypes have been released. Version 2.2.3 works on Plone 5.2 and will be included in Plone 5.2.7. Version 3.0.0a9 works on Plone 6 and will be included in Plone 6.0.0a3. Note that the Products.CMFPlone package has the same problem in the 4.3 series. In Plone 5.0-5.2, the default Products.ATContentTypes version has the same problem. See advisory. For all unpatched versions of the three packages, you can use the following workaround. Workaround Make sure the imageviewfullscreen page is not stored in the cache. In Plone: Login as Manager and go to Site Setup.…

Published by the source

1 Feb 2022, 00:48 UTC

Last modified by the source

5 Dec 2024, 05:40 UTC

Source last checked

26 Oct 2026, 13:08 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-f7qw-5fgj-247x

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-f7qw-5fgj-247x

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# Patch Next advisory brief: GHSA-f7qw-5fgj-247x

Advisory: Cross-site Scripting and Open Redirect in plone.app.contenttypes
IDs: GHSA-f7qw-5fgj-247x
Record: https://patchnext.com/advisories/ghsa-f7qw-5fgj-247x (revision 2, source checked 26 Oct 2026, 13:08 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: plone-app-contenttypes 2.2.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI plone-app-contenttypes: affected < 2.2.3; fixed in 2.2.3

## Suggested inspection (read-only)
- `python -m pip show plone-app-contenttypes`: 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 plone-app-contenttypes.
- 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-f7qw-5fgj-247x (OSV record GHSA-f7qw-5fgj-247x lists affected ranges: PyPI plone-app-contenttypes >=0 <2.2.3 (fixed))
- Verified: https://github.com/advisories/GHSA-f7qw-5fgj-247x (GitHub-reviewed advisory GHSA-f7qw-5fgj-247x lists affected ranges: PyPI plone-app-contenttypes >=0 <2.2.3)

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