CVE-2025-13434Public exploitNetwork attack vector

Unauthenticated response manipulation via crafted Host header

Published Nov 20, 2025 · Updated Nov 20, 2025

HTTP header injection in jameschz Hush Framework 2.0 allows remote attackers to alter response integrity through a crafted Host header. The HTTP Host Header Handler in hush-lib/hush/Util.php fails to neutralize scripting syntax in untrusted $_SERVER['HOST'] input. No authentication or user interaction is required; exploitation alters browser-interpreted response content, while confidentiality and availability impacts are not reported.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP header injection in jameschz Hush Framework 2.0 allows remote attackers to alter response integrity through a crafted Host header. The HTTP Host Header Handler in hush-lib/hush/Util.php fails to neutralize scripting syntax in untrusted $_SERVER['HOST'] input. No authentication or user interaction is required; exploitation alters browser-interpreted response content, while confidentiality and availability impacts are not reported.

The record

CVE
CVE-2025-13434
Published
Nov 20, 2025
Updated
Nov 20, 2025
Vendor
jameschz
Product
Hush Framework
Classifications
CWE-644, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 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=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

jameschz · Hush Frameworkversion=2.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-644Improper Neutralization of HTTP Headers for Scripting Syntax
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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