ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-57808
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-02 01:15:29 UTC
Updated2026-10-19 17:10:00 UTC
DescriptionESPHome 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

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

EPSS: 0.016270000 probability, percentile 0.758130000 (date 2026-10-19)

Problem Types: CWE-303 | NVD-CWE-noinfo | CWE-303 CWE-303: Incorrect Implementation of Authentication Algorithm

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Esphome Esphome Firmware 2025.8.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Esphome Esphome affected = 2025.8.0 Not specified

References

ReferenceSourceLinkTags
github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Exploit, Vendor Advisory
github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5 [email protected] github.com Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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