Another bunch of critical security vulnerabilities in Atlassian products were reported last week. This also includes a highly critical vulnerability CVE-2023-22522 in Atlassian Confluence, with a CVE Score of 8.8 (high). Atlassian gave the CVE a score of 9.0 (critical).
But after patching Confluence (using the bin file update process), we were surprised to see the following error when we tried to start Confluence:
The same error also shows up in the logs:
Unable to bootstrap application: The database driver (com.mysql.jdbc.Driver) was not found in the class path.<br/>This Confluence installation cannot be upgraded automatically. Please see Confluence documentation:<br/>https://confluence.atlassian.com/display/DOC/Database+Setup+For+MySQL
By looking at the output of the update process we were surprised to see that the update script removed the MySQL connector library:
List of modifications made within Confluence directories.
The following provides a list of file modifications within the confluence
The mysql-connector library was added months ago, to use MySQL 8.0 as database server.
While the Confluence update process ran, the jar library got removed from /opt/atlassian/confluence/lib/.
After copying mysql-connector-j-8.2.0.jar back into /opt/atlassian/confluence/lib/ (that's the default path, might depend on your installation), Confluence could be started successfully again.
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