CVE-2021-31702

7.5 highEPSS 1.2%

High (7.5) in frontiersoftware ichris. EPSS 1.2% chance of exploitation in the next 30 days.

Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host header, as demonstrated by submitting 127.0.0.1 multiple times for DoS.

Severity

CVSS 3.1

7.5 high

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

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)
Published: 2021-05-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

frontiersoftware:ichris

References

https://github.com/l00neyhacker/CVE-2021-31702
https://github.com/l00neyhacker/CVE-2021-31702

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