What is CVE-2019-19943?

CVE-2019-19943 is a high-severity vulnerability in Pablosoftwaresolutions Quick \'N Easy Web Server, classified under Double Free. CVSS score: 7.5/10. Published 2020-02-28.

How severe is CVE-2019-19943?

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

Is CVE-2019-19943 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Double Free in Pablosoftwaresolutions Quick \'N Easy Web Server

CVE-2019-19943

The HTTP service in quickweb.exe in Pablo Quick 'n Easy Web Server 3.3.8 allows Remote Unauthenticated Heap Memory Corruption via a large host or domain parameter. It may be possible to achieve remote code execution because of a double free.

Vulnerability class: Double Free

Published 2020-02-28 · 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: 0.043 (90.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.043 · newest: 0.043 · change: 0.000

Affected products

Pablosoftwaresolutions Quick \'N Easy Web Server

Weakness classification (CWE)

Public proof-of-concept exploits

References

www.exploit-db.com/exploits/48111 (Exploit, VDB Entry, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2019-19943?: CVE-2019-19943 is a high-severity vulnerability in Pablosoftwaresolutions Quick \'N Easy Web Server, classified under Double Free. CVSS score: 7.5/10. Published 2020-02-28.
How severe is CVE-2019-19943?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-19943 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.