CVE-2021-38751
MEDIUM NUCLEIExponentCMS < 2.6 - HTTP Host Header Injection in exponent_constants.php
Title source: llmExploitation Summary
CVE-2021-38751 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.
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.
Nuclei Templates (1)
ExponentCMS <= 2.6 - Host Header Injection
MEDIUMby dwisiswant0
References (1)
Core 1
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/exponentcms/exponent-cms/issues/1544
Scores
CVSS v3
4.3
EPSS
0.0247
EPSS Percentile
82.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Details
CWE
CWE-116
Status
published
Products (1)
exponentcms/exponentcms
< 2.6
Published
Aug 16, 2021
Tracked Since
Feb 18, 2026