cve-2025-55303

{
  "cvss": 6.9,
  "datePublished": "2026-02-12T00:00:00Z",
  "dateUpdated": "2026-02-12T00:00:00Z",
  "description": "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.",
  "dueDate": "",
  "id": "CVE-2025-55303",
  "kev_catalogs": [
    "vulncheck"
  ],
  "knownRansomwareCampaignUse": "Unknown",
  "product": "astro",
  "requiredAction": "Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.",
  "severity": "MEDIUM",
  "source": "vulncheck_kev",
  "title": "astro astro Improper Neutralization of Input During Web Page Generation",
  "vendor": "astro"
}