What is CVE-2025-66378?

CVE-2025-66378 is a medium-severity vulnerability in Pexip Infinity, classified under Incorrect Authorization. CVSS score: 5.9/10. Published 2025-12-25.

How severe is CVE-2025-66378?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Pexip Infinity

CVE-2025-66378

Pexip Infinity 38.0 and 38.1 before 39.0 has insufficient access control in the RTMP implementation, allowing an attacker to disconnect RTMP streams traversing a Proxy Node.

Vulnerability class: Broken Access Control

Published 2025-12-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (15.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Pexip Infinity — versions 38.0
Pexip Infinity

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

docs.pexip.com/admin/security_bulletins.htm (Vendor Advisory)

Frequently asked questions

What is CVE-2025-66378?: CVE-2025-66378 is a medium-severity vulnerability in Pexip Infinity, classified under Incorrect Authorization. CVSS score: 5.9/10. Published 2025-12-25.
How severe is CVE-2025-66378?: Medium severity. CVSS v3 base score is 5.9 out of 10.