CVE-2025-7777Network attack vector

Unauthenticated redirects via unsanitized Host header

Published Aug 20, 2025 · Updated Feb 27, 2026

Host header injection in Red Hat Mirror Registry for Red Hat OpenShift allows remote attackers to redirect clients to attacker-controlled domains. The application accepts the HTTP Host header without sanitization and uses the attacker-controlled value in redirects. No authentication is required to submit the request; redirected clients can be sent to phishing content, while no service interruption is reported.

CVSS severity6.5
Medium
EPSS probability0.21%
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 Red Hat Mirror Registry for Red Hat OpenShift allows remote attackers to redirect clients to attacker-controlled domains. The application accepts the HTTP Host header without sanitization and uses the attacker-controlled value in redirects. No authentication is required to submit the request; redirected clients can be sent to phishing content, while no service interruption is reported.

The record

CVE
CVE-2025-7777
Published
Aug 20, 2025
Updated
Feb 27, 2026
Vendor
389 Directory Server
Product
Mirror Registry for Red Hat OpenShift
Classifications
CWE-601, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Mirror Registry for Red Hat OpenShiftAffected versions are unavailable in this record.

Published CVSS scores

6.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1189Drive-by Compromise

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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