Atlassian fixes critical Confluence hardcoded credentials flaw

By Sergiu Gatlan, Bleeping Computer

Atlassian has patched a critical hardcoded credentials vulnerability in Confluence Server and Data Center that could let remote, unauthenticated attackers log into vulnerable, unpatched servers.

The hardcoded password is added after installing the Questions for Confluence app (versions 2.7.34, 2.7.35, and 3.0.2) for a user account with the username disabledsystemuser — designed to help admins with the migration of data from the app to the Confluence Cloud.

According to Atlassian, the app helps improve communication with the organization's internal Q&A team and is currently installed on over 8,000 Confluence servers.

"The disabledsystemuser account is created with a hardcoded password and is added to the confluence-users group, which allows viewing and editing all non-restricted pages within Confluence by default," the company explained in a security advisory published on Wednesday.

"A remote, unauthenticated attacker with knowledge of the hardcoded password could exploit this to log into Confluence and access any pages the confluence-users group has access to."

Atlassian says it has no evidence and is yet to receive reports that the vulnerability (tracked as CVE-2022-26138) is being exploited in the wild.

However, the company warned that "the hardcoded password is trivial to obtain after downloading and reviewing affected versions of the app."


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