CVE-2019-19943: The HTTP service in quickweb.exe in Pablo Quick 'n Easy Web Server 3.3.8 allows Remote Unauthenticated Heap Me

Q: How do I fix CVE-2019-19943?

quick \'n easy web server: upgrade to newer than 3.3.8. Exact commands for each OS are on this page.

Q: Is CVE-2019-19943 being exploited?

CVE-2019-19943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-19943 affect?

CVE-2019-19943 affects quick \'n easy web server. Severity is high (CVSS 7.5). 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

Q: How urgent is CVE-2019-19943?

Priority 59/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2019-19943 is a high-severity flaw (CVSS 7.5) affecting quick \'n easy web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.3% (top 9%)
CISA exploited list	No
Weakness	CWE-415, CWE-787
Published	2020-02-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pablosoftwaresolutions

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-02-28 20:15 UTCPublished CVE record published
2026-06-17 02:27 UTCUpdated Record last modified

pablosoftwaresolutions quick \'n easy web server UPGRADE

Affected: <= 3.3.8

Fixed in: newer than 3.3.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy quick-n-easy-web-server || rpm -q quick-n-easy-web-server || quick-n-easy-web-server --version

2. UPGRADE to newer than 3.3.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade quick-n-easy-web-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade quick-n-easy-web-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-19943?

quick \'n easy web server: upgrade to newer than 3.3.8. Exact commands for each OS are on this page.

Is CVE-2019-19943 being exploited?

CVE-2019-19943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-19943 affect?

CVE-2019-19943 affects quick \'n easy web server. Severity is high (CVSS 7.5). 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

How urgent is CVE-2019-19943?

Priority 59/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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