VULNERABILITY INTELLIGENCE

CVE-2019-3877

CVSS score5.8 MEDIUM
EPSS probability2.12%
CISA KEVNot currently listed
Published2019-03-27
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Description

A vulnerability was found in mod_auth_mellon before v0.14.2. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function.

Weakness classification

  • CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Primary references