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Vulnerability details: VCID-7vja-km1g-5bdg
Vulnerability ID VCID-7vja-km1g-5bdg
Aliases CVE-2025-54793
GHSA-cq8c-xv66-36gw
Summary Astros's duplicate trailing slash feature leads to an open redirection security issue There is an Open Redirection 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 Astro >=5.2.0 sites that use on-demand rendering (SSR) with the Node or Cloudflare adapter. It does not affect static sites, or sites deployed to Netlify or Vercel.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01096 https://api.first.org/data/v1/epss?cve=CVE-2025-54793
epss 0.01096 https://api.first.org/data/v1/epss?cve=CVE-2025-54793
cvssv4 5.5 https://github.com/withastro/astro
generic_textual MODERATE https://github.com/withastro/astro
cvssv4 5.5 https://github.com/withastro/astro/commit/0567fb7b50c0c452be387dd7c7264b96bedab48f
generic_textual MODERATE https://github.com/withastro/astro/commit/0567fb7b50c0c452be387dd7c7264b96bedab48f
ssvc Track https://github.com/withastro/astro/commit/0567fb7b50c0c452be387dd7c7264b96bedab48f
cvssv4 5.5 https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw
generic_textual MODERATE https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw
ssvc Track https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw
cvssv4 5.5 https://nvd.nist.gov/vuln/detail/CVE-2025-54793
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2025-54793
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2025-54793
https://github.com/withastro/astro
https://github.com/withastro/astro/commit/0567fb7b50c0c452be387dd7c7264b96bedab48f
CVE-2025-54793 https://nvd.nist.gov/vuln/detail/CVE-2025-54793
GHSA-cq8c-xv66-36gw https://github.com/advisories/GHSA-cq8c-xv66-36gw
GHSA-cq8c-xv66-36gw https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P Found at https://github.com/withastro/astro
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

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physical

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P Found at https://github.com/withastro/astro/commit/0567fb7b50c0c452be387dd7c7264b96bedab48f
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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passive

active

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none

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-08-08T16:55:19Z/ Found at https://github.com/withastro/astro/commit/0567fb7b50c0c452be387dd7c7264b96bedab48f
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P Found at https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

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none

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-08-08T16:55:19Z/ Found at https://github.com/withastro/astro/security/advisories/GHSA-cq8c-xv66-36gw
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P Found at https://nvd.nist.gov/vuln/detail/CVE-2025-54793
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

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low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.78362
EPSS Score 0.01096
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:24:33.180242+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/astro/CVE-2025-54793.yml 38.6.0