Check the Joomla 1.5.18 Post-Release FAQs to see if there are important items and helpful hints discovered after the release.

If you have modified core template overrides, please be sure to back them up before upgrading.
Security
- High Priority – Core – XSS Vulnerabilities in back end.
Components
- No component issues were fixed for this release
Modules
- No module issues were fixed for this release.
Plugins
- Revert issue 19859 (Graceful handling of Apache plugin failures) (20424)
Legacy
- No legacy issues were fixed for this release.
Templates
- No Templates issues were fixed for this release.
Language
- No Language issues were fixed for this release.
Administrator
- No Administrator issues were fixed for this release.
System
- No System issues were fixed for this release.
Statistics for the 1.5.18 release period:
- Joomla 1.5.18 contains:
- 1 issues fixed in SVN
- 3 commits
- Tracker activity resulted in a net increase of 21 active issues:
- 29 new reports
- 7 closed
- 1 fixed in SVN
- At the time the 1.5.18 release was packaged, the tracker had 337 active issues:
- 195 open
- 105 confirmed
- 37 pending