A long running background process, such as remote checks for core or extension updates, had created a race condition where a session which was expected to be destroyed would be recreated.
This vulnerability affects the following application versions:
- Joomla 3.5.0
- Joomla 3.5.0-rc
- Joomla 3.5.0-rc2
- Joomla 3.5.0-rc3
- Joomla 3.5.0-rc4
- Joomla 3.5.1
- Joomla 3.5.1-rc
- Joomla 3.5.1-rc2
- Joomla 3.6.0
- Joomla 3.6.0-rc
- Joomla 3.6.0-rc2
- Joomla 3.6.1
- Joomla 3.6.1-rc1
- Joomla 3.6.1-rc2
- Joomla 3.6.2
- Joomla 3.6.3
- Joomla 3.6.3-rc1
- Joomla 3.6.3-rc2
- Joomla 3.6.3-rc3
- Joomla 3.6.4
- Joomla 3.6.5
- Joomla 3.7.0
- Joomla 3.7.0-rc1
- Joomla 3.7.0-rc2
- Joomla 3.7.0-rc3
- Joomla 3.7.0-rc4
- Joomla 3.7.1
- Joomla 3.7.1-rc1
- Joomla 3.7.1-rc2
- Joomla 3.7.2
- Joomla 3.7.3
- Joomla 3.7.3-rc1
- Joomla 3.7.3-rc2
- Joomla 3.7.4
- Joomla 3.7.4-rc1
- Joomla 3.7.5
- Joomla 3.8.0
- Joomla 3.8.0-rc1
- Joomla 3.8.1
- Joomla 3.8.1-rc
- Joomla 3.8.2
- Joomla 3.8.2-rc
- Joomla 3.8.3
- Joomla 3.8.3-rc
- Joomla 3.8.4
- Joomla 3.8.4-rc
- Joomla 3.8.4-rc2
- Joomla 3.8.5
- Joomla 3.8.5-rc
- Joomla 3.8.6
- Joomla 3.8.6-rc1
- Joomla 3.8.7
- Joomla 3.8.7-rc
- Joomla 3.8.8-rc