CVE-2023-27482
A remotely exploitable vulnerability bypassing authentication for accessing the Supervisor API through Home Assistant has been discovered.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 72.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
homeassistant is an open source home automation tool. A remotely exploitable vulnerability bypassing authentication for accessing the Supervisor API through Home Assistant has been discovered. This impacts all Home Assistant installation types that use the Supervisor 2023.01.1 or older. Installation types, like Home Assistant Container (for example Docker), or Home Assistant Core manually in a Python environment, are not affected. The issue has been mitigated and closed in Supervisor version 2023.03.1, which has been rolled out to all affected installations via the auto-update feature of the Supervisor. This rollout has been completed at the time of publication of this advisory. Home Assistant Core 2023.3.0 included mitigation for this vulnerability. Upgrading to at least that version is thus advised. In case one is not able to upgrade the Home Assistant Supervisor or the Home Assistant Core application at this time, it is advised to not expose your Home Assistant instance to the internet.
- CVSS 3.1
- 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 72.17% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- home-assistant/home-assistant · home-assistant/supervisor
- Source
- security-advisories@github.com
EPSS 72.2% since 10 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/elttam/publications/blob/master/writeups/home-assistant/supervisor-authentication-bypass-advisory.md
- https://github.com/home-assistant/core/security/advisories/GHSA-2j8f-h4mr-qr25Vendor Advisory
- https://www.elttam.com/blog/pwnassistant/
- https://www.home-assistant.io/blog/2023/03/08/supervisor-security-disclosure/Issue Tracking, Vendor Advisory
- https://github.com/elttam/publications/blob/master/writeups/home-assistant/supervisor-authentication-bypass-advisory.md
- https://github.com/home-assistant/core/security/advisories/GHSA-2j8f-h4mr-qr25Vendor Advisory
- https://www.elttam.com/blog/pwnassistant/
- https://www.home-assistant.io/blog/2023/03/08/supervisor-security-disclosure/Issue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.