CVE-2020-23566

Name: CVE-2020-23566
Creator: NVD / NIST
Published: 2021-11-05T17:15:11.12+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2020-23566 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Irfanview v4.53 was discovered to contain an infinity loop via JPEG2000!ShowPlugInSaveOptions_W+0x1ecd8.. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

Irfanview v4.53 was discovered to contain an infinity loop via JPEG2000!ShowPlugInSaveOptions_W+0x1ecd8.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.79%

51.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-835

Affected Software

Vendor	Product	Versions
Irfanview	Irfanview	4.53

References

https://github.com/KamasuOri/publicResearch/tree/master/poc/irfanview/1Third Party Advisory
https://github.com/KamasuOri/publicResearch/tree/master/poc/irfanview/1Third Party Advisory

Timeline

Published: Nov 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-23566?

Irfanview v4.53 was discovered to contain an infinity loop via JPEG2000!ShowPlugInSaveOptions_W+0x1ecd8.

How severe is CVE-2020-23566?

CVE-2020-23566 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2020-23566?

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-2020-23566?

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

Scan your code now

Source: NVD / NIST