2021-38751 | ExponentCMS HTTP Host Header exponent_constants.php injection
|CVSS Meta Temp Score
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A vulnerability classified as critical was found in ExponentCMS up to 2.6. This vulnerability affects some unknown processing of the file /exponent_constants.php of the component HTTP Host Header Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-74. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:
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.
The weakness was presented 08/16/2021. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-38751 since 08/16/2021. The exploitation appears to be easy. Access to the local network is required for this attack to succeed. Required for exploitation is a single authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/18/2021).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9
Status: Not defined
0-Day Time: 🔒
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