Possibilities of IP Spoofing via X-Forwarded-For (XFF) Header

published 2025-07-29 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-22996

cvss: 8.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits: 0; none known

In HDP Server versions below 4.6.2.2978 on Linux, unauthorized access could occur via IP spoofing using the X-Forwarded-For header.

Since XFF is a client-controlled header, it could be spoofed, allowing unauthorized access if the spoofed IP matched a whitelisted range.

This vulnerability could be exploited to bypass IP restrictions, though valid user credentials would still be required for resource access.

Patch / fix

fixed in 1

Progress Software Hybrid Data Pipeline 4.6.2.2978

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 15 mo ago (2025-07-29)

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.4	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected products

Progress Software Hybrid Data Pipeline

Classification

Weakness

CWE-345 Insufficient Verification of Data Authenticity

References

community.progress.com /s/article/DataDirect-Hybrid-Data-Pipeline-Critical-Security-Product-Alert-Bulletin-July-2025---CVE-2025-6504
vendor-advisory

Sources

CVE List CVE-2025-6504
NVD CVE-2025-6504

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary