ONLYOFFICE 9.2.1 - December 26, 2025

Fixes

Document Editor

• Fixed word break in Korean

Spreadsheet Editor

• Fixed an issue with data overlap when transferring sheets between documents via Move or Copy

PDF Editor

• Fixed an error when opening a PDF file
• Fixed an error when scrolling pages in a PDF file
• Fixed errors when copying, pasting, and undoing actions with the Find panel in PDF Editing mode
• Fixed an error when deleting a page from a document while working with the Find panel in PDF Editing mode

Security

• Fixed the XSS injection in the Color theme name using a custom Prepared exploit
• Fixed the XSS injection of JS code in the Font field for the Multilevel list settings window
• Fixed a vulnerability in the textarea of the comment editing form
• Fixed the possibility of memory manipulation when converting XLS to XLSX, which can lead to information leakage
• Fixed issues with memory manipulation when converting XLS to XLSX, which can lead to RCE