CVE-2025-48865
Fabio HTTP Hop-by-Hop Header Manipulation Vulnerability
Description
Fabio is an HTTP(S) and TCP router for deploying applications managed by consul. Prior to version 1.6.6, Fabio allows clients to remove X-Forwarded headers (except X-Forwarded-For) due to a vulnerability in how it processes hop-by-hop headers. Fabio adds HTTP headers like X-Forwarded-Host and X-Forwarded-Port when routing requests to backend applications. Since the receiving application should trust these headers, allowing HTTP clients to remove or modify them creates potential security vulnerabilities. Some of these custom headers can be removed and, in certain cases, manipulated. The attack relies on the behavior that headers can be defined as hop-by-hop via the HTTP Connection header. This issue has been patched in version 1.6.6.
INFO
Published Date :
May 30, 2025, 7:15 a.m.
Last Modified :
June 4, 2025, 7:54 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-48865.
| URL | Resource |
|---|---|
| https://github.com/fabiolb/fabio/commit/fdaf1e966162e9dd3b347ffdd0647b39dc71a1a3 | Patch |
| https://github.com/fabiolb/fabio/releases/tag/v1.6.6 | Release Notes |
| https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf | Exploit Vendor Advisory |
| https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf | Exploit Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-48865 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-48865 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jun. 04, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-345 Added CPE Configuration OR *cpe:2.3:a:fabiolb:fabio:*:*:*:*:*:go:*:* versions up to (excluding) 1.6.6 Added Reference Type GitHub, Inc.: https://github.com/fabiolb/fabio/commit/fdaf1e966162e9dd3b347ffdd0647b39dc71a1a3 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/fabiolb/fabio/releases/tag/v1.6.6 Types: Release Notes Added Reference Type CISA-ADP: https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 30, 2025
Action Type Old Value New Value Added Reference https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf -
New CVE Received by [email protected]
May. 30, 2025
Action Type Old Value New Value Added Description Fabio is an HTTP(S) and TCP router for deploying applications managed by consul. Prior to version 1.6.6, Fabio allows clients to remove X-Forwarded headers (except X-Forwarded-For) due to a vulnerability in how it processes hop-by-hop headers. Fabio adds HTTP headers like X-Forwarded-Host and X-Forwarded-Port when routing requests to backend applications. Since the receiving application should trust these headers, allowing HTTP clients to remove or modify them creates potential security vulnerabilities. Some of these custom headers can be removed and, in certain cases, manipulated. The attack relies on the behavior that headers can be defined as hop-by-hop via the HTTP Connection header. This issue has been patched in version 1.6.6. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-345 Added CWE CWE-348 Added Reference https://github.com/fabiolb/fabio/commit/fdaf1e966162e9dd3b347ffdd0647b39dc71a1a3 Added Reference https://github.com/fabiolb/fabio/releases/tag/v1.6.6 Added Reference https://github.com/fabiolb/fabio/security/advisories/GHSA-q7p4-7xjv-j3wf
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-48865 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-48865
weaknesses.