CVE-2025-57808

nvd nist nuclei

Published: Sep 2, 2025Modified: Jun 17, 2026

8.1

Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitability: 2.8 / Impact: 5.2

Source: security-advisories@github.com (Secondary)

Description

ESPHome is a system to control microcontrollers remotely through Home Automation systems. In version 2025.8.0 in the ESP-IDF platform, ESPHome's web_server authentication check can pass incorrectly when the client-supplied base64-encoded Authorization value is empty or is a substring of the correct value. This allows access to web_server functionality (including OTA, if enabled) without knowing any information about the correct username or password. This issue has been patched in version 2025.8.1.

Affected (1)

Products: Esphome: Esphome Firmware

1 product

Esphome Firmware

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Esphome Esphome Firmware	Version 2025.8.0

Related CWEs

Incorrect Implementation of Authentication Algorithm

The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.

References (3)

https://github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5

Source: security-advisories@github.com

Patch

https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635

Source: security-advisories@github.com

ExploitVendor Advisory

https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitVendor Advisory

Timeline

No history available yet.