VULNERABILITY INTELLIGENCE

CVE-2019-3878

CVSS score8.1 HIGH
EPSS probability2.97%
CISA KEVNot currently listed
Published2019-03-26
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Description

A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.

Weakness classification

  • CWE-287: Improper Authentication
  • CWE-305: Authentication Bypass by Primary Weakness

Primary references