What is CVE-2021-31645?

CVE-2021-31645 is a high-severity vulnerability in Glftpd, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2022-07-07.

How severe is CVE-2021-31645?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Glftpd

CVE-2021-31645

An issue was discovered in glFTPd 2.11a that allows remote attackers to cause a denial of service via exceeding the connection limit.

Published 2022-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.020 (79.6th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.020 · change: +0.001

Affected products

Glftpd — versions 2.11a

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

glftpd.io/ (Vendor Advisory)
www.exploit-db.com/exploits/49773 (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-31645?: CVE-2021-31645 is a high-severity vulnerability in Glftpd, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2022-07-07.
How severe is CVE-2021-31645?: High severity. CVSS v3 base score is 7.5 out of 10.