5.1.21 (stable)

Release 5.1.21 has been published on October 13, 2017
  • Please read the ILIAS 5.1 feature page for information about new and abandoned features and changed behaviour of this version.
  • Information about first time installation can be found here.
  • Securing web files has been changed in 5.1 due to the new Web Access Checker. Please read how to put HTML and SCORM modules, media files and user profile images under RBAC control.
  • With ILIAS 5.1.5 the "Return-Path" used for external emails is configurable (for PHP > 5.3.x or deactivated 'safe_mode') from within the ILIAS mail administration. Certain server configurations which rely on the "Return-Path" being set automatically on OS level require this new configuration to be properly set in ILIAS. To address this as a hotfix, a new configuration option, located at "Administration » Mail", was introduced. Please check this option because due to obvious reasons, there is no meaningful default that works for all platforms. This step was necessary due to the introduction of PHPMailer, which was necessary due to the introduction of HTML brackets. PHPMailer sets the "Return-Path" property to the "FROM" property per default, so we had to make this changeable (affects -f mail()-parameter and ini setting: 'sendmail_from').
Instructions for updating ILIAS can be found in section 3 of the general installation instructions. For major updates (e.g. 4.4.x -> 5.0.x) the safest proceeding is, to upgrade a copy of your productive system first and test whether everything works ok.
If you use a customized skin/style, please change the skin settings for root user and default of installation to ‘delos‘ before upgrading from a 4.x version to 5.1.x. Otherwise you may not login any more due to templates changes in 5.0 and 5.1.
ILIAS is free, open source software and published under the GNU General Public License (GPL).

Format: .zip
Download (
149 MB, 2017-10-13

Format: .tar.gz
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142 MB, 2017-10-13

Changed Behaviour

  • MD5 as hashing algorithm for passwords has been abandoned, see: [[Abandon MD5 Password Encryption]]. This also affects the XML user import (see also: xml/ilias_user_5_1.dtd). Passwords have to be passed as plain text and will be bcrypt hashed during the import process.

Fixed Bugs

The following bugs reported in Mantis have been resolved:

* #0008670: [Login, Auth & Registration] Style tab missing from login page editor (smeyer)
* #0008403: [Login, Auth & Registration] Accordion displays open only on login page (smeyer)
* #0007206: [Login, Auth & Registration] Registration form does not respect default language (smeyer)
* #0006144: [Login, Auth & Registration] Error message instead of redirect to login after session timeout (smeyer)
* #0021504: [File] Short array syntax not supported for PHP 5.3 (fschmid)
* #0019389: [SOAP & Webservices] New Password-encryption and changed XML user import causes Stud.IP-ILIAS-Connection to fail (smeyer)
* #0017671: [Course Management] Failed test: Kurs vom Zielort aus kopieren (smeyer)
* #0015395: [Course Management] Failed test: Kurs kopieren (smeyer)
* #0016596: [Course Management] Copy of a course, Progress-bar ? (smeyer)
* #0011144: [Calendar] Previous/Next month link not working in calendar on PD (smeyer)
* #0010560: [Calendar] iCal-Einrichtung geht nicht mehr (Outlook, iPhone4, Google) (smeyer)
* #0010800: [Calendar] Date formatting (smeyer)
* #0010479: [Calendar] Deleted event still appears in subscribed calendar (smeyer)
* #0010304: [Calendar] Presentation Problem Calendar Selection (smeyer)
* #0020993: [_Other] Copying folders results in infinite page refresh loop after the copy process has been completed successfully (smeyer)
* #0011195: [SCORM Online Editor] When pages are copied and pasted in SCORM editor, duplicates are created in glossary (akill)
* #0006214: [Login, Auth & Registration] Database login in setup can't handle "%" in password, MDB2 Error (smeyer)
* #0019727: [Item Groups] Textinput cuts out html tags (akill)

Security Fixes