CVE-2021-23191

Name: CVE-2021-23191
Creator: NVD / NIST
Published: 2022-03-02T23:15:08.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.08%

Last modified Jun 17, 2026

CVE-2021-23191 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A security issue was found in htmldoc v1.9.12 and before. A NULL pointer dereference in the function image_load_jpeg() in image.cxx may result in denial of service.. EPSS estimates a 1.08% chance of exploitation in the next 30 days.

Description

A security issue was found in htmldoc v1.9.12 and before. A NULL pointer dereference in the function image_load_jpeg() in image.cxx may result in denial of service.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

1.08%

60.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Htmldoc Project	Htmldoc	<= 1.9.12

References

https://bugzilla.redhat.com/show_bug.cgi?id=1967022Issue Tracking, Patch, Third Party Advisory
https://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdcPatch, Third Party Advisory
https://github.com/michaelrsweet/htmldoc/issues/415Exploit, Issue Tracking, Third Party Advisory
https://ubuntu.com/security/CVE-2021-23191Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1967022Issue Tracking, Patch, Third Party Advisory
https://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdcPatch, Third Party Advisory
https://github.com/michaelrsweet/htmldoc/issues/415Exploit, Issue Tracking, Third Party Advisory
https://ubuntu.com/security/CVE-2021-23191Third Party Advisory

Timeline

Published: Mar 2, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23191?

A security issue was found in htmldoc v1.9.12 and before. A NULL pointer dereference in the function image_load_jpeg() in image.cxx may result in denial of service.

How severe is CVE-2021-23191?

CVE-2021-23191 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23191?

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-2021-23191?

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

Scan your code now

Source: NVD / NIST