CVE-2025-53094

ESPAsyncWebServer is an asynchronous HTTP and WebSocket server library for ESP32, ESP8266, RP2040 and RP2350. In versions up to and including 3.7.8, a CRLF (Carriage Return Line Feed) injection vulnerability exists in the construction and output of HTTP headers within `AsyncWebHeader.cpp`. Unsanitized input allows attackers to inject CR (`\r`) or LF (`\n`) characters into header names or values, leading to arbitrary header or response manipulation. Manipulation of HTTP headers and responses can enable a wide range of attacks, making the severity of this vulnerability high. A fix is available at pull request 211 and is expected to be part of version 3.7.9.

CVSS

No CVSS.

References

Link	Resource
https://github.com/ESP32Async/ESPAsyncWebServer/blob/1095dfd1ecf1a903aede29854232af1b24f089b1/src/AsyncWebHeader.cpp#L6-L32
https://github.com/ESP32Async/ESPAsyncWebServer/pull/211
https://github.com/ESP32Async/ESPAsyncWebServer/security/advisories/GHSA-87j8-6f7g-h8wh

Configurations

No configuration.

History

30 Jun 2025, 18:38

Type	Values Removed	Values Added
Summary		(es) ESPAsyncWebServer es una librería de servidor HTTP y WebSocket asíncrono para ESP32, ESP8266, RP2040 y RP2350. En versiones hasta la 3.7.8 (incluida), existe una vulnerabilidad de inyección CRLF (Carriage Return Line Feed) en la construcción y salida de encabezados HTTP dentro de `AsyncWebHeader.cpp`. La entrada no depurada permite a los atacantes inyectar caracteres CR (`\r`) o LF (`\n`) en los nombres o valores de los encabezados, lo que provoca la manipulación arbitraria de encabezados o respuestas. La manipulación de encabezados y respuestas HTTP puede permitir una amplia gama de ataques, lo que aumenta la gravedad de esta vulnerabilidad. Hay una solución disponible en la solicitud de incorporación de cambios 211 y se espera que forme parte de la versión 3.7.9.

27 Jun 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-06-27 20:15

Updated : 2025-06-30 18:38

NVD link : CVE-2025-53094

Mitre link : CVE-2025-53094

CVE.ORG link : CVE-2025-53094

JSON object : View

Products Affected

No product.

CWE

CWE-93

Improper Neutralization of CRLF Sequences ('CRLF Injection')

CWE-113

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')

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