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CVE-2021-38751

MEDIUMCVSS 4.3/10EPSS 2.47%

Last modified

CVE-2021-38751 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 2.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability
2.47%

82.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ExponentcmsExponentcms< 2.6

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-38751?
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.
How severe is CVE-2021-38751?
CVE-2021-38751 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 2.47% probability of exploitation in the next 30 days.
How do I fix CVE-2021-38751?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-38751?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST