What is CVE-2020-23565?

CVE-2020-23565 is a high-severity vulnerability in Irfanview. CVSS score: 7.8/10. Published 2021-11-05.

How severe is CVE-2020-23565?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Irfanview

CVE-2020-23565

Irfanview v4.53 allows attackers to execute arbitrary code via a crafted JPEG 2000 file. Related to a "Data from Faulting Address controls Branch Selection starting at JPEG2000!ShowPlugInSaveOptions_W+0x0000000000032850".

Published 2021-11-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Irfanview — versions 4.53

References

github.com/KamasuOri/publicResearch/tree/master/poc/irfanview/3 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-23565?: CVE-2020-23565 is a high-severity vulnerability in Irfanview. CVSS score: 7.8/10. Published 2021-11-05.
How severe is CVE-2020-23565?: High severity. CVSS v3 base score is 7.8 out of 10.