What is CVE-2020-9426?

CVE-2020-9426 is a medium-severity vulnerability in Open-Xchange Ox Guard, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-06-15.

How severe is CVE-2020-9426?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Open-Xchange Ox Guard

CVE-2020-9426

OX Guard 2.10.3 and earlier allows XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Open-Xchange Ox Guard — versions 2.10.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.open-xchange.com/ (Vendor Advisory)
seclists.org/fulldisclosure/2020/Jun/20 (Mailing List, Third Party Advisory)
packetstormsecurity.com/files/158069/OX-Guard-2.10.3-Cross-Site-Scripting-Serve… (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2020-9426?: CVE-2020-9426 is a medium-severity vulnerability in Open-Xchange Ox Guard, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-06-15.
How severe is CVE-2020-9426?: Medium severity. CVSS v3 base score is 6.1 out of 10.