See SA-CONTRIB-2012-078 - Smart Breadcrumb - Cross Site Scripting (XSS).
Fixing XSS vulnerability reported by coltrane:
The function filter_titles() incorrectly attempts to set a title to plain-text, but is only using Drupal's t() function which does not run any sanitization.
Maintenance and security release of the Drupal 7 series. Only fixes for security vulnerabilities have been committed. New features are only being added to the forthcoming Drupal 8.0 release.
This release fixes security vulnerabilities. Sites are urged to upgrade immediately after reading the security announcement:
Resolves issue with Spaces and Spaces OG modules (part of the spaces package) which in some cases did not apply the expected spaces access permission to pages that are non-objects (e.g. /node)