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CVE-2025-55207

20
FAUCET Score

CVE-2025-55207 is an Open Redirect vulnerability affecting Astro, a web framework, in versions prior to 9.4.1, specifically when using the Node deployment adapter in standalone mode with trailingSlash set to "always". This allows attackers to craft malicious links that appear legitimate, potentially leading to credential theft or malware distribution. With a CVSS score of 5.5 (Medium), the attack requires no privileges or user interaction, but the impact is limited to low integrity and confidentiality. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
WithastroAstro
< 9.4.1CNA affected

CVSS Data

CVSS version used by this source: 4.0

5.5MEDIUM

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
LOW
SS Integrity
LOW
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 28th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: @astrojs/nodeFixed in: 9.4.1

Vendor Advisories (1)

npmGHSA-9x9c-ghc5-jhw9medium

@astrojs/node's trailing slash handling causes open redirect issue

Aug 15, 2025

References

github.com / withastro/astro/commit/5fc3c599cacb0172cc7d8e1202a5f2e8685d7ef2
github.com / withastro/astro/security/advisories/GHSA-9x9c-ghc5-jhw9