CVE-2025-55303
CVE-2025-55303 · Unauthorized third-party images in Astro’s _image endpoint
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 6.9 · Medium · EPSS 0.6% · Public exploit · Fix available
- Published
- Updated
Stack: node
Affected products and versions
astro
- Versions
- >= 5.0.0-alpha.0, < 5.13.2: Affected
- < 4.16.18: Affected
No fix published
astro npm
- Affected ranges
- SEMVER: ≥ 5.0.0-alpha.0, < 5.13.2
Update to 5.13.2
@astrojs/node npm
- Affected ranges
- SEMVER: < 9.1.1
Update to 9.1.1
astro npm
- Affected ranges
- SEMVER: < 4.16.19
Update to 4.16.19