5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2023-34036

CVE-2023-34036: Spring HATEOAS vulnerable to Improper Neutralization of HTTP Headers for Scripting Syntax

Reactive web applications that use Spring HATEOAS to produce hypermedia-based responses might be exposed to malicious forwarded headers if they are not behind a trusted proxy that ensures correctness of such headers, or if they don't have anything else in place to handle (and possibly discard) forwarded headers either in WebFlux or at the level of the underlying HTTP server.

For the application to be affected, it needs to satisfy the following requirements:

It needs to use the reactive web stack (Spring WebFlux) and Spring HATEOAS to create links in hypermedia-based responses.
The application infrastructure does not guard against clients submitting (X-)Forwarded… headers.

(GitHub Advisory)

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CVE-2023-34036

CVE-2023-34036:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.springframework.hateoas:spring-hateoas	maven	< 1.5.5	1.5.5
org.springframework.hateoas:spring-hateoas	maven	>= 2.0.0, < 2.0.5	2.0.5
org.springframework.hateoas:spring-hateoas	maven	>= 2.1.0, < 2.1.1	2.1.1

Technical Details

Vulnerability Intelligence
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Root Cause Analysis

The provided vulnerability information does not include specific code snippets, commit diffs, or GitHub patch details that explicitly identify vulnerable functions. The advisory describes a systemic issue in how Spring HATEOAS handles (X-)Forwarded headers in reactive environments (WebFlux) when generating hypermedia links, but it does not name specific methods or classes. The vulnerability stems from the broader interaction between Spring HATEOAS' link generation logic and untrusted headers, rather than a single isolated function. Without access to the patched code or explicit documentation of the affected functions, we cannot confidently map the vulnerability to specific function names or file paths.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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