家族のサイトで利用しているCMSツール「Joomla!」をバージョン3.8.8から3.8.10にアップデートしました。

～　リリースノート　～
Joomla 3.8.9 Release

What’s in 3.8.9?

Joomla 3.8.9 addresses two security vulnerabilities and several bugs, including the fatal error in the random image module, the error on uploading images in child folder, and several other bugs and improvements, including:
Security Issues Fixed

Low Priority – Core – Local File Inclusion with PHP 5.3 (affecting Joomla 2.5.0 through 3.8.8) More information »
Low Priority – Core – XSS vulnerability in language switcher module (affecting Joomla 1.6.0 through 3.8.8) More information »

Bug fixes and Improvements

Correctly escape the random image module output #20533
Fix folder browsing and file upload that broke in 3.8.8 due to escaping #20586
com_mailto (mail to friend) allows the usage of a Captcha by using JForm #20265
Tag indexing improvement #13868
Fix use of hyphens in data attributes #20579
Updates to third party PHP libraries #20583
CodeMirror updated to 5.38.0 #20636

　
Joomla 3.8.10 Release

What’s in 3.8.10?

Joomla 3.8.10 is addressing one bug introduced into Joomla 3.8.9. This release is fixing the autoloader for Windows platforms.
If you are using a Windows platform, please update your site to 3.8.10 as soon as possible.

　
　　
セキュリティ問題を対処したバージョン3.8.9とそこでのバグの修正が行われたバージョン3.8.10が立て続けにリリースされたようです。
Joomla!ご利用者は早めのアップデートがお勧めです。
しーゆー。