What is CVE-2020-5620?

CVE-2020-5620 is a medium-severity vulnerability in Exceedone Exment, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-08-25.

How severe is CVE-2020-5620?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Exceedone Exment

CVE-2020-5620

Cross-site scripting vulnerability in Exment prior to v3.6.0 allows remote authenticated attackers to inject arbitrary script or HTML via a specially crafted file.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Exceedone Exment
Kajitori Co.,ltd Exment — versions prior to v3.6.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

exment.net/docs/ (Vendor Advisory)
jvn.jp/en/jp/JVN88315581/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-5620?: CVE-2020-5620 is a medium-severity vulnerability in Exceedone Exment, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-08-25.
How severe is CVE-2020-5620?: Medium severity. CVSS v3 base score is 5.4 out of 10.