CVEvulnerability

CVE-2025-57808

8.1 HIGH Published 2025-09-02 Modified 2026-10-19 Official page ↗
Status
Analyzed
Published
2025-09-02
Last modified
2026-10-19
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-303

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 configurations

• esphome esphome firmware 2025.8.0

Related

Weakness · CWE (1)

  • CWE-303 Incorrect Implementation of Authentication Algorithm weakness

References