A new update for XOOPS (http://xoops.org) has  been released - XOOPS 2.5.1. According to the release article on XOOPS.org -

Several bugs have been fixed as well as security enhancement based on Aung Khant's report.

Please be aware that the bugfix is not complete and 2.5 series will be following small but frequent release rule so that users can take advantage of quick fixes.

There also have been some security reports about the XOOPS 2.5.x series, but the developers have assured the community they are properly addressed.

You can download the this version of XOOPS from their file repository on SourceForge

Here are the changes that are part of the 2.5.1 release -

XOOPS 2.5 Changelog
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2011/03/23: Version 2.5.1 Final
===============================
Bugfixes:
- ID: 3219412 Block Cloning : parent module (mid) not saved when cloning(trabis)
- ID: 3219408 Block management : data not saved when editing(trabis)
- ID: 3229007 Setting # of banner impressions has no effect(trabis)
 
 
===============================
2011/03/15: Version 2.5.1 RC
===============================
Updates:
 - Updated suico and zetagenesis themes, zetadigme system admin theme (kris_fr)
 
 
===============================
2011/03/15: Version 2.5.1 RC
===============================
Security improvements:
 - Added filters to output data to avoid potential XSS (phppp/Aung Khant)
Updates:
 - Update zetadigme admin gui (kris_fr)
 - New MIME types (mojtabajml/kris_fr)
 - Update jquery and jquery ui to last version (voltan)
 - Fix bug in help page url in modules/system/class/gui.php (voltan)
 - Add image URL show option in Image Manager (voltan)
Bugfixes:
 - ID: 3168899 Module weight Arrangment bug, change order only for visible blocks (trabis)
 - ID: 3167970 Banner edit generates a new banner(trabis)
 - ID: 3153597 Banner management: URL click mandatory(trabis)
 - ID: 3111137 Module Block is cloned as custom block(trabis)
 
Added Language constants:
  modules/system/language/english/admin/images.php _AM_SYSTEM_IMAGES_URL
  modules/system/themes/default/language/english/admin/admin.php _OXYGEN_XOOPSENGINE
 
Modified Language constants:
  modules/system/themes/default/language/english/admin/admin.php _OXYGEN_ABOUT_TEXT, _OXYGEN_WEBSITE
  modules/system/language/english/helper/help_center.html, modulesadmin.html
 
Removed Language constants:
  modules/system/themes/default/language/english/admin/admin.php _OXYGEN_XGIFTSHOP, _OXYGEN_XDONATIONS, _OXYGEN_XDONATIONS_TEXT, _OXYGEN_KEY, _OXYGEN_LICENSE, _OXYGEN_SOURCEFORGE_TEXT, _OXYGEN_POWERED_BY
  modules/system/themes/default/language/english/admin/admin.php _OXYGEN_XGIFTSHOP, _OXYGEN_XDONATIONS, _OXYGEN_XDONATIONS_TEXT, _OXYGEN_KEY, _OXYGEN_LICENSE, _OXYGEN_SOURCEFORGE_TEXT, _OXYGEN_POWERED_BY