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CVE-2025-57808— ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header

Quick assessment

Affected
esphome esphome
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ESPHome是ESPHome开源的一个配置、管理智能硬件的系统。用于控制Esp8266/Esp32硬件，实现家庭自动化控制。 ESPHome 2025.8.0版本存在安全漏洞，该漏洞源于web_server身份验证检查不当，可能导致未经授权访问。

CVSS 8.1 · High EPSS 1.57% · P75

Public Exploits 1

Nuclei · 1 CVE-2025-57808.yaml [template]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-57808

Vulnerability Information
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Vulnerability Title
ESP-IDF web_server basic auth bypass using empty or incomplete Authorization header
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证算法的不正确实现
Source: CVE Program / CVE List V5
Vulnerability Title
ESPHome 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ESPHome是ESPHome开源的一个配置、管理智能硬件的系统。用于控制Esp8266/Esp32硬件，实现家庭自动化控制。 ESPHome 2025.8.0版本存在安全漏洞，该漏洞源于web_server身份验证检查不当，可能导致未经授权访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
esphome esphome = 2025.8.0 -

II. Public POCs for CVE-2025-57808

# POC Description Source Link Shenlong Link
1 ESPHome 2025.8.0 contains an authentication bypass caused by improper validation of base64-encoded Authorization values in the web_server component, letting attackers access functionality without valid credentials, exploit requires crafted Authorization header. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-57808.yaml POC Details
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Qwen3.6-35B-A3B · 9635 chars
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III. Intelligence Information for CVE-2025-57808

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IV. Related Vulnerabilities

Same product: esphome
Same vendor: esphome
Same weakness: CWE-303

V. Comments for CVE-2025-57808

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