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GHSA-4gpr-p634-922x: Cross site scripting via input unit widget

Impact

Authenticated users can inject malicious code in widgets with units, which is then executed both in the element preview (back end) and on the website (front end).

Patches

Update to Contao 4.9.42, 4.13.28 or 5.1.10.

Workarounds

Disable login for all untrusted back end users.

References

https://contao.org/en/security-advisories/cross-site-scripting-in-widgets-with-units

For more information

If you have any questions or comments about this advisory, open an issue in contao/contao.

Credits

Thanks to Maximilian Seilmaier from usd AG for reporting this vulnerability.

ghsa
#xss#vulnerability#web#git#auth
  1. GitHub Advisory Database
  2. GitHub Reviewed
  3. CVE-2023-36806

Cross site scripting via input unit widget

Moderate severity GitHub Reviewed Published Jul 25, 2023 in contao/contao • Updated Jul 25, 2023

Package

composer contao/core-bundle (Composer)

Affected versions

>= 4.0.0, < 4.9.42

>= 4.10.0, < 4.13.28

>= 5.0.0, < 5.1.10

Patched versions

4.9.42

4.13.28

5.1.10

Impact

Authenticated users can inject malicious code in widgets with units, which is then executed both in the element preview (back end) and on the website (front end).

Patches

Update to Contao 4.9.42, 4.13.28 or 5.1.10.

Workarounds

Disable login for all untrusted back end users.

References

https://contao.org/en/security-advisories/cross-site-scripting-in-widgets-with-units

For more information

If you have any questions or comments about this advisory, open an issue in contao/contao.

Credits

Thanks to Maximilian Seilmaier from usd AG for reporting this vulnerability.

References

  • GHSA-4gpr-p634-922x

Published to the GitHub Advisory Database

Jul 25, 2023

Last updated

Jul 25, 2023

Related news

CVE-2023-36806: Merge pull request from GHSA-4gpr-p634-922x · contao/contao@5c9aff3

Contao is an open source content management system. Starting in version 4.0.0 and prior to versions 4.9.42, 4.13.28, and 5.1.10, it is possible for untrusted backend users to inject malicious code into headline fields in the back end, which will be executed both in the element preview (back end) and on the website (front end). Installations are only affected if there are untrusted back end users who have the rights to modify headline fields, or other fields using the input unit widget. Contao 4.9.42, 4.13.28, and 5.1.10 have a patch for this issue. As a workaround, disable the login for all untrusted back end users.