CVE-2025-54793
CVE-2025-54793 is a medium-severity vulnerability in Astro with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v4: 5.5
- EPSS exploit prediction: 1% (43rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-23968
- Weakness: CWE-601
- Affected product: Astro
- Published:
- Last modified:
Description
Astro is a web framework for content-driven websites. In versions 5.2.0 through 5.12.7, there is an Open Redirect vulnerability in the trailing slash redirection logic when handling paths with double slashes. This allows an attacker to redirect users to arbitrary external domains by crafting URLs such as https://mydomain.com//malicious-site.com/. This increases the risk of phishing and other social engineering attacks. This affects sites that use on-demand rendering (SSR) with the Node or Cloudflare adapters. It does not affect static sites, or sites deployed to Netlify or Vercel. This issue is fixed in version 5.12.8. To work around this issue at the network level, block outgoing redirect responses with a Location header value that starts with `//`.
Frequently asked questions
- What is CVE-2025-54793?
- Astro is a web framework for content-driven websites. In versions 5.2.0 through 5.12.7, there is an Open Redirect vulnerability in the trailing slash redirection logic when handling paths with double slashes. This allows an attacker to redirect users to arbitrary external domains by crafting URLs such as https://mydomain.com//malicious-site.com/. This increases the risk of phishing and other social engineering attacks. This affects sites that use on-demand rendering (SSR) with the Node or Cloudflare adapters. It does not affect static sites, or sites deployed to Netlify or Vercel. This issue is fixed in version 5.12.8. To work around this issue at the network level, block outgoing redirect responses with a Location header value that starts with `//`.
- How severe is CVE-2025-54793?
- CVE-2025-54793 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2025-54793 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-54793?
- CVE-2025-54793 affects Astro. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-54793?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-54793 have an EU (EUVD) identifier?
- Yes. CVE-2025-54793 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23968.
- When was CVE-2025-54793 published?
- CVE-2025-54793 was published on 2025-08-08 and last updated on 2026-06-17.
References
- https://github.com/withastro/astro/commit/0567fb7b50c0c452be387dd7c7264b96bedab48f
- https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw
Affected products (1)
- cpe:2.3:a:astro:astro:*:*:*:*:*:node.js:*:*
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