CVE-2025-4328Public exploitNetwork attack vector

Authenticated open redirect via trusted Referer header

Published May 6, 2025 · Updated May 6, 2025

Open redirect in fp2952 Spring Cloud Base allows remote authenticated users to redirect victims via a crafted Referer header. MvcController.sendBack removes any query string from the unvalidated header and passes the remaining external URL directly to sendRedirect. Exploitation requires access to the endpoint and victim interaction, enabling trusted application URLs to deliver victims to attacker-controlled sites.

CVSS severity5.1
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

Open redirect in fp2952 Spring Cloud Base allows remote authenticated users to redirect victims via a crafted Referer header. MvcController.sendBack removes any query string from the unvalidated header and passes the remaining external URL directly to sendRedirect. Exploitation requires access to the endpoint and victim interaction, enabling trusted application URLs to deliver victims to attacker-controlled sites.

The record

CVE
CVE-2025-4328
Published
May 6, 2025
Updated
May 6, 2025
Vendor
fp2952
Product
Spring Cloud Base
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2025CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=7f050dc6db9afab82c5ce1d41cd74ed255ec9bfa

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

fp2952 · Spring Cloud Baseversion=7f050dc6db9afab82c5ce1d41cd74ed255ec9bfa

Published CVSS scores

4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
5.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Phishing: Spearphishing Link

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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