CVE-2025-55207
published 2025-08-15CVE-2025-55207: Astro is a web framework for content-driven websites. Following CVE-2025-54793 there's still an Open Redirect vulnerability in a subset of Astro deployment…
PriorityP430medium5.5CVSS 4.0
AVNACLATNPRNUINVCNVINVANSCLSILSANEPCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.57%
45.8th percentile
Astro is a web framework for content-driven websites. Following CVE-2025-54793 there's still an Open Redirect vulnerability in a subset of Astro deployment scenarios prior to version 9.4.1. Astro 5.12.8 addressed CVE-2025-54793 where https://example.com//astro.build/press would redirect to the external origin //astro.build/press. However, with the Node deployment adapter in standalone mode and trailingSlash set to "always" in the Astro configuration, https://example.com//astro.build/press still redirects to //astro.build/press. This affects any user who clicks on a specially crafted link pointing to the affected domain. Since the domain appears legitimate, victims may be tricked into trusting the redirected page, leading to possible credential theft, malware distribution, or other phishing-related attacks. This issue has been patched in version 9.4.1.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| astrojs | node | >= 0 < 9.4.1 | 9.4.1 |
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GHSA
@astrojs/node's trailing slash handling causes open redirect issue
ghsa·2025-08-15
CVE-2025-55207 [MEDIUM] CWE-601 @astrojs/node's trailing slash handling causes open redirect issue
@astrojs/node's trailing slash handling causes open redirect issue
### Summary
Following https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw, there's still an Open Redirect vulnerability in a subset of Astro deployment scenarios.
### Details
Astro 5.12.8 fixed a case where `https://example.com//astro.build/press` would redirect to the external origin `//astro.build/press`. However, with the Node deployment adapter in standalone mode and `trailingSlash` set to `"always"` in the Astro configuration, `https://example.com//astro.build/press` still redirects to `//astro.build/press`.
### Proof of Concept
1. Create a new minimal Astro project (`[email protected]`)
2. Configure it to use the Node adapter (`@astrojs/[email protected]`) and force trailing slashes:
```js
// astro.co
OSV
@astrojs/node's trailing slash handling causes open redirect issue
osv·2025-08-15
CVE-2025-55207 [MEDIUM] @astrojs/node's trailing slash handling causes open redirect issue
@astrojs/node's trailing slash handling causes open redirect issue
### Summary
Following https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw, there's still an Open Redirect vulnerability in a subset of Astro deployment scenarios.
### Details
Astro 5.12.8 fixed a case where `https://example.com//astro.build/press` would redirect to the external origin `//astro.build/press`. However, with the Node deployment adapter in standalone mode and `trailingSlash` set to `"always"` in the Astro configuration, `https://example.com//astro.build/press` still redirects to `//astro.build/press`.
### Proof of Concept
1. Create a new minimal Astro project (`[email protected]`)
2. Configure it to use the Node adapter (`@astrojs/[email protected]`) and force trailing slashes:
```js
// astro.co
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-08-15
Published