CVE-2021-31645

HIGH

glFTPd 2.11a - Denial of Service via Connection Limit Exhaustion

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-31645. PoCs published by xynmaps.

AI-analyzed exploit summary This exploit performs a Denial of Service (DoS) attack against glFTPd 2.11a by flooding the server with multiple FTP connections, exhausting its connection limit. It uses threading to spawn multiple FTP processes and includes a timer to restart the attack periodically.

Description

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

Exploits (1)

exploitdb WORKING POC
by xynmaps · pythondosmultiple
https://www.exploit-db.com/exploits/49773

This exploit performs a Denial of Service (DoS) attack against glFTPd 2.11a by flooding the server with multiple FTP connections, exhausting its connection limit. It uses threading to spawn multiple FTP processes and includes a timer to restart the attack periodically.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: glFTPd 2.11a
No auth needed
Prerequisites: Network access to the target FTP server · FTP port (default 21) must be open
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Vendor Advisory x_refsource_misc
https://glftpd.io/
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/49773

Scores

CVSS v3 7.5
EPSS 0.0167
EPSS Percentile 73.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-770
Status published
Products (1)
glftpd/glftpd 2.11a
Published Jul 07, 2022
Tracked Since Feb 18, 2026