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.
Published: 2025-09-02
Score: 8.1 High
EPSS: 6.2% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-26385 ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header
Github GHSA Github GHSA GHSA-mxh2-ccgj-8635 ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header
History

Wed, 10 Sep 2025 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Esphome esphome Firmware
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:o:esphome:esphome_firmware:2025.8.0:*:*:*:*:*:*:*
Vendors & Products Esphome esphome Firmware

Tue, 02 Sep 2025 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Esphome
Esphome esphome
Vendors & Products Esphome
Esphome esphome

Tue, 02 Sep 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 02 Sep 2025 00:45:00 +0000

Type Values Removed Values Added
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.
Title ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header
Weaknesses CWE-303
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}


Subscriptions

Esphome Esphome Esphome Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-09-02T14:03:58.777Z

Reserved: 2025-08-20T14:30:35.010Z

Link: CVE-2025-57808

cve-icon Vulnrichment

Updated: 2025-09-02T14:03:51.885Z

cve-icon NVD

Status : Analyzed

Published: 2025-09-02T01:15:29.947

Modified: 2025-09-10T19:03:00.280

Link: CVE-2025-57808

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-02T15:23:05Z

Weaknesses