CVE-2025-55303

Astro is a web framework for content-driven websites. In versions of astro before 5.13.2 and 4.16.18, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. On-demand rendered sites built with Astro include an /_image endpoint which returns optimized versions of images. A bug in impacted versions of astro allows an attacker to bypass the third-party domain restrictions by using a protocol-relative URL as the image source, e.g. /_image?href=//example.com/image.png. This vulnerability is fixed in 5.13.2 and 4.16.18.

CVSS

No CVSS.

References

Link	Resource
https://github.com/withastro/astro/commit/4d16de7f95db5d1ec1ce88610d2a95e606e83820
https://github.com/withastro/astro/security/advisories/GHSA-xf8x-j4p2-f749
https://github.com/withastro/astro/security/advisories/GHSA-xf8x-j4p2-f749

Configurations

No configuration.

History

20 Aug 2025, 14:40

Type	Values Removed	Values Added
Summary		(es) Astro es un framework web para sitios web basados en contenido. En versiones de Astro anteriores a la 5.13.2 y la 4.16.18, el endpoint de optimización de imágenes en proyectos implementados con renderizado bajo demanda permite la entrega de imágenes de dominios de terceros no autorizados. Los sitios web renderizados bajo demanda creados con Astro incluyen un endpoint /_image que devuelve versiones optimizadas de las imágenes. Un error en las versiones afectadas de Astro permite a un atacante eludir las restricciones de dominio de terceros utilizando una URL relativa al protocolo como fuente de la imagen, por ejemplo, /_image?href=//example.com/image.png. Esta vulnerabilidad se corrigió en las versiones 5.13.2 y 4.16.18.

19 Aug 2025, 21:15

Type	Values Removed	Values Added
References	~~() https://github.com/withastro/astro/security/advisories/GHSA-xf8x-j4p2-f749 -~~	() https://github.com/withastro/astro/security/advisories/GHSA-xf8x-j4p2-f749 -

19 Aug 2025, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-08-19 19:15

Updated : 2025-08-20 14:40

NVD link : CVE-2025-55303

Mitre link : CVE-2025-55303

CVE.ORG link : CVE-2025-55303

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-115

Misinterpretation of Input

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