CVE-2025-57808HIGH 8.1EPSS p71.2%

CVE-2025-57808CVE-2025-57808

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS1.51% probability of exploitation · percentile 71.2% · 2026-06-19T12:03:05Z
Published2025-09-02
Last modified2025-09-10

Underlying weaknesses· 1

CWE-303

References

  1. https://github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5
  2. https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635
  3. https://github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635

1

TypeTargetConfidenceTier
WeaknessIncorrect Implementation of Authentication Algorithmcwe-3030%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.