What is CVE-2021-44213?

CVE-2021-44213 is a medium-severity vulnerability in Open-Xchange Ox App Suite, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-03-28.

How severe is CVE-2021-44213?

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

XSS in Open-Xchange Ox App Suite

CVE-2021-44213

OX App Suite through 7.10.5 allows XSS via uuencoding in a multipart/alternative message.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-03-28 · 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: 0.009 (59.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Open-Xchange Ox App Suite

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

open-xchange.com (Product, Vendor Advisory)
packetstormsecurity.com/files/166389/OX-App-Suite-7.10.5-Cross-Site-Scripting.h… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-44213?: CVE-2021-44213 is a medium-severity vulnerability in Open-Xchange Ox App Suite, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-03-28.
How severe is CVE-2021-44213?: Medium severity. CVSS v3 base score is 6.1 out of 10.