Drupal 8.4.x versions before 8.4.5 and Drupal 7.x versions before 7.57 has a Drupal.checkPlain() JavaScript function which is used to escape potentially dangerous text before outputting it to HTML (as JavaScript output does not typically go through Twig autoescaping). This function does not correctly handle all methods of injecting malicious HTML, leading to a cross-site scripting vulnerability under certain circumstances. The PHP functions which Drupal provides for HTML escaping are not affected.
CVSS Details
- CVSS 3.1 Base Score: 6.1
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade drupal7 | Feb 27, 2018 | Feb 24, 2018 |
| Drupal | — | Upgrade to drupal version 8.4.5Upgrade to drupal version 7.57 | Aug 8, 2018 | Mar 1, 2018 |
| Freebsd | — | Upgrade drupal8Upgrade drupal7 | Feb 27, 2018 | Feb 25, 2018 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Mar 1, 2018 |
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