CVE-2025-61925Public exploitNetwork attack vector

URL manipulation via unvalidated forwarded host

Published Oct 10, 2025 · Updated Oct 10, 2025

Host header injection in Astro before 5.14.2 allows remote attackers to manipulate generated URLs through X-Forwarded-Host. The server-side URL construction path trusts X-Forwarded-Host over Host without validation, causing Astro.url consumers to emit attacker-chosen origins. Reachability requires on-demand rendering and a response that uses Astro.url; a caching proxy can persist poisoned links for later visitors.

CVSS severity6.5
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Host header injection in Astro before 5.14.2 allows remote attackers to manipulate generated URLs through X-Forwarded-Host. The server-side URL construction path trusts X-Forwarded-Host over Host without validation, causing Astro.url consumers to emit attacker-chosen origins. Reachability requires on-demand rendering and a response that uses Astro.url; a caching proxy can persist poisoned links for later visitors.

The record

CVE
CVE-2025-61925
Published
Oct 10, 2025
Updated
Oct 10, 2025
Vendor
Astro Technology Company
Product
Astro
Classifications
CWE-470, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.14.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Astro Technology Company · Astroversion=< 5.14.2

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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