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Moodle 4.5.13

Security Support Only Moodle Version
This version of Moodle receives security fixes, but is no longer supported for general bug fixes.
You may view the releases page to see the support status of all Moodle versions.

Release date: 10 August 2026

Here is the full list of fixed issues in 4.5.13.

General fixes and improvements​

  • MDL-88878 - OpenAI AI provider: json_encode() escapes slashes in model name, causing 404 with OpenAI-compatible providers

Accessibility fixes and improvements​

  • MDL-89252 - "Add a new category" button in custom fields administration cannot be activated by keyboard
  • MDL-88964 - TinyMCE editor accessibility issues
  • MDL-88956 - Assignment editing: Missing accessible label on the "Word limit" field
  • MDL-88951 - TinyMCE image details modal: Fake headings, delete image button issues
  • MDL-88354 - Empty link in the sortable list dialogue
  • MDL-89221 - The recently accessed courses block's pagination controls obscures block controls (move/action menu)
  • MDL-88963 - Target size below 24x24px minimum for block action buttons
  • MDL-88962 - Course Home edit mode: No status message when moving sections
  • MDL-88961 - Calendar: Day event tooltip not dismissable without moving focus
  • MDL-88958 - Accessibility issues in Comments
  • MDL-88957 - Accessibility issues with the custom fields admin pages
  • MDL-88955 - Assignment grading: Sticky table header is misplaced at 400% zoom
  • MDL-88932 - Chevron icon on the message drawer conversation item has insufficient contrast on hover
  • MDL-88833 - Nested search landmark role involving core/search_input_auto
  • MDL-88528 - Logo image breaks main menu on small screens (mobile)
  • MDL-88173 - qtype_multichoice: Screen readers do not announce question text for radio button groups
  • MDL-71231 - Make previous/next chapter links for the book activity more meaningful

Security fixes​

A number of security related issues were resolved. Details of these issues will be released after a period of approximately one week to allow system administrators to safely update to the latest version.