CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:N/I:P/A:N
EPSS
Percentile
45.1%
The Zen theme is a powerful, yet simple, HTML5 starting theme with a responsive, mobile-first grid design.
The theme does not properly sanitize theme settings before they are used in the output of a page. Themes that have copied code from Zen’s template.php may suffer from this same issue. If your theme creates variables in a preprocess using text from a custom theme setting, like this:
$variables['skip_link_text'] = theme_get_setting('skip_link_text');
you can prevent malicious XSS attacks by modifying the code to look like this:
$variables['skip_link_text'] = check_plain(theme_get_setting('skip_link_text'));
This vulnerability is mitigated by the fact that an attacker must have a role with the permission “administer theme”.
Drupal core is not affected. If you do not use the contributed Zen theme, there is nothing you need to do.
Install the latest version:
Also see the Zen project page.