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Astro development server error page vulnerable to reflected Cross-site Scripting

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2025-64745

Published

Astro is a web framework. Starting in version 5.2.0 and prior to version 5.15.6, a Reflected Cross-Site Scripting (XSS) vulnerability exists in Astro's development server error pages when the `trailingSlash` configuration option is used. An attacker can inject arbitrary JavaScript code that executes in the victim's browser context by crafting a malicious URL. While this vulnerability only affects the development server and not production builds, it could be exploited to compromise developer environments through social engineering or malicious links. Version 5.15.6 fixes the issue.

Source published
13 Nov 2025 20:26:13 UTC
Source modified
13 Nov 2025 21:20:30 UTC
Observed here
23 Oct 2026 15:48:27 UTC
Source terms
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CVSS 3.1 · 2.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

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Sources read 9 Nov 06:36 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current