What is CVE-2025-6505?

CVE-2025-6505 is a high-severity vulnerability in Linux Kernel, classified under Improper Authentication. CVSS score: 8.1/10. Published 2025-07-29.

How severe is CVE-2025-6505?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Linux Kernel

CVE-2025-6505

Unauthorized access and impersonation can occur in versions 4.6.2.3226 and below of Progress Software's Hybrid Data Pipeline Server on Linux. This vulnerability allows attackers to combine credentials from different sources, potentially leading to client impersonation and unauthorized access. When OAuth Clients perform an OAuth handshake with the Hybrid Data Pipeline Server, the server accepts client credentials from both HTTP headers and request parameters.

Vulnerability class: Broken Authentication

EPSS: 0.003 (25.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux Linux_kernel
Progress Hybrid_data_pipeline
Progress Software Hybrid Data Pipeline — versions 0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security@progress.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-6505?: CVE-2025-6505 is a high-severity vulnerability in Linux Kernel, classified under Improper Authentication. CVSS score: 8.1/10. Published 2025-07-29.
How severe is CVE-2025-6505?: High severity. CVSS v3 base score is 8.1 out of 10.