High severity8.1NVD Advisory· Published Sep 2, 2025· Updated Jun 17, 2026
CVE-2025-57808
CVE-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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
esphomePyPI | < 2025.8.1 | 2025.8.1 |
Affected products
3- cpe:2.3:o:esphome:esphome_firmware:2025.8.0:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
4- github.com/esphome/esphome/commit/2aceb56606ec8afec5f49c92e140c8050a6ccbe5nvdPatchWEB
- github.com/esphome/esphome/security/advisories/GHSA-mxh2-ccgj-8635nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-mxh2-ccgj-8635ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-57808ghsaADVISORY
News mentions
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