A user with a valid account on a Confluence Server or Data Center instance is able to execute arbitrary Java code or run arbitrary system commands by injecting an OGNL payload.

The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.

Affected versions:

 * version < 6.13.23
 * 6.14.0 ≤ version < 7.4.11
 * 7.5.0 ≤ version < 7.11.6
 * 7.12.0 ≤ version < 7.12.5

Fixed versions:

 * 6.13.23
 * 7.4.11
 * 7.11.6
 * 7.12.5
 * 7.13.0