VULNERABILITY INTELLIGENCE

CVE-2021-38751

CVSS score4.3 MEDIUM
EPSS probability2.47%
CISA KEVNot currently listed
Published2021-08-16
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Description

A HTTP Host header attack exists in ExponentCMS 2.6 and below in /exponent_constants.php. A modified HTTP header can change links on the webpage to an arbitrary value, leading to a possible attack vector for MITM.

Weakness classification

  • CWE-116: Improper Encoding or Escaping of Output

Primary references