CVE-2025-2950Network attack vector

Authenticated domain manipulation via unneutralized Host header

Published Apr 18, 2025 · Updated Aug 28, 2025

Host header injection in IBM operating-system releases 7.3 through 7.6 allows remote authenticated users to alter generated host references. The Navigator web interface accepts an attacker-controlled Host header without neutralizing it before using the value as a domain or IP address. A valid Navigator session is required; IBM has not disclosed the affected handler or resulting behavior beyond changed domain or IP references.

CVSS severity5.4
Medium
EPSS probability0.31%
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 IBM operating-system releases 7.3 through 7.6 allows remote authenticated users to alter generated host references. The Navigator web interface accepts an attacker-controlled Host header without neutralizing it before using the value as a domain or IP address. A valid Navigator session is required; IBM has not disclosed the affected handler or resulting behavior beyond changed domain or IP references.

The record

CVE
CVE-2025-2950
Published
Apr 18, 2025
Updated
Aug 28, 2025
Vendor
IBM
Product
IBM i
Classifications
CWE-644
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=7.3
  2. Affected versionversion=7.4
  3. Affected versionversion=7.5
  4. Affected versionversion=7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM iversion=7.3; version=7.4; version=7.5; version=7.6

Published CVSS scores

5.4IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-644Improper Neutralization of HTTP Headers for Scripting Syntax

Public exploit references

No public exploit references are available in this record.

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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