CVE-2020-15689

Name: CVE-2020-15689
Creator: NVD / NIST
Published: 2020-07-13T14:15:11.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2020-15689 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Appweb before 7.2.2 and 8.x before 8.1.0, when built with CGI support, mishandles an HTTP request with a Range header that lacks an exact range. This may result in a NULL pointer dereference and cause a denial of service.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

Appweb before 7.2.2 and 8.x before 8.1.0, when built with CGI support, mishandles an HTTP request with a Range header that lacks an exact range. This may result in a NULL pointer dereference and cause a denial of service.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Embedthis	Appweb	< 7.2.2
Embedthis	Appweb	>= 8.0.0, < 8.1.0

References

https://github.com/embedthis/appweb-gpl/issues/2Broken Link
https://github.com/embedthis/appweb-gpl/issues/2Broken Link

Timeline

Published: Jul 13, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15689?

How severe is CVE-2020-15689?

CVE-2020-15689 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15689?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15689?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST