Summary
CVE-2026-82383 is a Missing Authentication for Critical Function vulnerability (CWE-306) in Apache Roller 6.1.5 that allows an unauthenticated remote attacker to persistently modify the site-global frontpage weblog configuration. The flaw stems from the setup action remaining anonymously reachable and able to persist configuration changes even after the initial installation is complete, with no authorization check enforced. The issue carries a CVSS v3.1 base score of 8.2 (High).
Technical details
- Root cause: Apache Roller’s setup action, intended only for first-run bootstrap of the application, did not enforce an authentication or authorization check on the request that selects and persists the site’s frontpage weblog.
- Trigger conditions: No optional feature or non-default configuration is required; any installed Roller 6.1.5 instance is reachable and exploitable in its default state.
- Attack vector: Network-based, low attack complexity, no privileges and no user interaction required (AV:N/AC:L/PR:N/UI:N).
- Impact: An attacker can persistently change which weblog is displayed as the site’s public frontpage, resulting in high integrity impact and low availability impact — the public frontpage can be redirected to unintended content or broken, with administrative recovery required to restore the correct configuration.
Affected software
- Apache Roller 6.1.5
Severity
- CVSS v3.1 Base Score: 8.2 (High)
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Mitigation and recommended actions
- Immediate: Upgrade to Apache Roller 6.1.6 or later, which moves the initial frontpage weblog selection into a dedicated action restricted to global administrators and routes all subsequent changes through the global configuration path, which also enforces global-administrator permission.
- If no patch can be applied immediately: Restrict network access to the Roller setup/administration endpoints (e.g., via a reverse proxy or firewall rule) so they are reachable only from trusted administrative networks, and monitor for unexpected changes to the configured frontpage weblog.

