Atlassian Confluence starting with 4.3.0 before 6.2.1 did not check if a user had permission to view a page when creating a workbox notification about new comments. An attacker who can login to Confluence could receive workbox notifications, which contain the content of comments, for comments added to a page after they started watching it even if they do not have permission to view the page itself.
[
{
"product": "Confluence Server",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "Versions of Confluence starting with 4.3.0 before 6.2.1 are affected by this vulnerability."
}
]
}
]