CVE-2025-66202 Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765

Astro is a web framework. Versions 5.15.7 and below have a double URL encoding bypass which allows any unauthenticated attacker to bypass path-based authentication checks in Astro middleware, granting unauthorized access to protected routes. While the original CVE-2025-64765 was fixed in v5.15.8,...

CVE-2025-66202

Astro (web framework) is affected by CVE-2025-66202: versions 5.15.7 and below are vulnerable to a double URL encoding bypass that lets unauthenticated attackers bypass middleware pathname checks and access protected routes. The fix for CVE-2025-64765 in 5.15.8 decodes URLs only once, leaving roo...

CVE-2025-66202 Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765

Astro is a web framework. Versions 5.15.7 and below have a double URL encoding bypass which allows any unauthenticated attacker to bypass path-based authentication checks in Astro middleware, granting unauthorized access to protected routes. While the original CVE-2025-64765 was fixed in v5.15.8,...

PT-2025-48291

Name of the Vulnerable Software and Affected Versions Astro versions 5.15.7 and below Description Astro, a web framework, is affected by a double URL encoding bypass. This allows unauthenticated attackers to bypass path-based authentication checks in Astro middleware, potentially granting...

CVE-2025-64757

Astro is a web framework. Prior to version 5.14.3, a vulnerability has been identified in the Astro framework's development server that allows arbitrary local file read access through the image optimization endpoint. The vulnerability affects Astro development environments and allows remote...

CVE-2025-64765

Astro is a web framework. Prior to version 5.15.8, a mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the...

CVE-2025-65019

Astro is a web framework. Prior to version 5.15.9, when using Astro's Cloudflare adapter @astrojs/cloudflare with output: 'server', the image optimization endpoint /image contains a critical vulnerability in the isRemoteAllowed function that unconditionally allows data: protocol URLs. This enable...

Astro Cloudflare adapter has Stored Cross-site Scripting vulnerability in /_image endpoint

Summary A Cross-Site Scripting XSS vulnerability exists in Astro when using the @astrojs/cloudflare adapter with output: 'server'. The built-in image optimization endpoint /image uses isRemoteAllowed from Astro’s internal helpers, which unconditionally allows data: URLs. When the endpoint receive...

CVE-2025-65019

Astro is a web framework. Prior to version 5.15.9, when using Astro's Cloudflare adapter @astrojs/cloudflare with output: 'server', the image optimization endpoint /image contains a critical vulnerability in the isRemoteAllowed function that unconditionally allows data: protocol URLs. This enable...

CVE-2025-64764

Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feature is used in the targeted application, regardless of what was intended by the component templates. This issue has been patched in version 5.15.8...

CVE-2025-64765

Astro is a web framework. Prior to version 5.15.8, a mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the...

CVE-2025-64757

Astro is a web framework. Prior to version 5.14.3, a vulnerability has been identified in the Astro framework's development server that allows arbitrary local file read access through the image optimization endpoint. The vulnerability affects Astro development environments and allows remote...

CVE-2025-64765 Astro middleware authentication checks based on url.pathname can be bypassed via url encoded values

Astro is a web framework. Prior to version 5.15.8, a mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the...

CVE-2025-64765 Astro middleware authentication checks based on url.pathname can be bypassed via url encoded values

Astro is a web framework. Prior to version 5.15.8, a mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the...

CVE-2025-64765 Astro middleware authentication checks based on url.pathname can be bypassed via url encoded values

Astro is a web framework. Prior to version 5.15.8, a mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the...

CVE-2025-64765

Astro (web framework) vulnerability CVE-2025-64765 and related advisories describe a path normalization mismatch: Astro uses decodeURI for routing, while middleware reads context.url.pathname without the same normalization. This permits bypassing path-based authentication by double-encoded URLs (...

CVE-2025-64764 Astro is vulnerable to Reflected XSS via the server islands feature

Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feature is used in the targeted application, regardless of what was intended by the component templates. This issue has been patched in version 5.15.8...

CVE-2025-64764

Astro (web framework) prior to 5.15.8 is affected by a reflected XSS via the server islands feature. The root cause is improper handling of the server islands endpoint, allowing a payload to be reflected and executed in the user’s browser. The issue is fixed in version 5.15.8 and later. Public pr...

CVE-2025-64764 Astro is vulnerable to Reflected XSS via the server islands feature

Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feature is used in the targeted application, regardless of what was intended by the component templates. This issue has been patched in version 5.15.8...

CVE-2025-65019 Astro Cloudflare adapter has a Stored Cross Site Scripting vulnerability in /_image endpoint

Astro is a web framework. Prior to version 5.15.9, when using Astro's Cloudflare adapter @astrojs/cloudflare with output: 'server', the image optimization endpoint /image contains a critical vulnerability in the isRemoteAllowed function that unconditionally allows data: protocol URLs. This enable...