CVE-2023-34036Network attack vector

Hypermedia link manipulation via untrusted forwarded headers

Published Jul 17, 2023 · Updated Oct 30, 2024

Header injection in VMware Spring HATEOAS 1.5.0 through 1.5.4, 2.0.0 through 2.0.4, and 2.1.0 lets remote attackers alter generated links. In WebFlux applications, hypermedia link generation consumes client-controlled Forwarded and X-Forwarded headers when constructing response URLs. Exploitation requires a hypermedia endpoint and infrastructure that neither validates nor discards those headers; the resulting impact is confined to links returned in responses.

CVSS severity5.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Header injection in VMware Spring HATEOAS 1.5.0 through 1.5.4, 2.0.0 through 2.0.4, and 2.1.0 lets remote attackers alter generated links. In WebFlux applications, hypermedia link generation consumes client-controlled Forwarded and X-Forwarded headers when constructing response URLs. Exploitation requires a hypermedia endpoint and infrastructure that neither validates nor discards those headers; the resulting impact is confined to links returned in responses.

The record

CVE
CVE-2023-34036
Published
Jul 17, 2023
Updated
Oct 30, 2024
Vendor
VMware
Product
Spring HATEOAS
Classifications
CWE-644, CWE-116
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2024Record 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=1.5.4 or older
  2. Affected versionversion=2.0.4 or older
  3. Affected versionversion=2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VMware · Spring HATEOASversion=1.5.4 or older; version=2.0.4 or older; version=2.1.0

Published CVSS scores

5.3VMwareCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-644Improper Neutralization of HTTP Headers for Scripting Syntax
CWE-116Improper Encoding or Escaping of Output

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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