CVE-2021-38751

4.3 MEDIUM

A HTTP Host header attack exists in ExponentCMS 2.6 and below in /exponent_constants.php

Published: 2021-08-16 · Last updated: 2026-06-17

Severity and scoring

CVSS: 4.3 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE: CWE-116

Affected products

Vendor	Product
exponentcms	exponentcms

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-38751
[Exploit reference]https://github.com/exponentcms/exponent-cms/issues/1544
[Exploit reference]https://github.com/exponentcms/exponent-cms/issues/1544

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