What is CVE-2020-26554?

CVE-2020-26554 is a medium-severity vulnerability in Reddoxx Maildepot, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-11-18.

How severe is CVE-2020-26554?

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

XSS in Reddoxx Maildepot

CVE-2020-26554

REDDOXX MailDepot 2033 (aka 2.3.3022) allows XSS via an incoming HTML e-mail message.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-11-18 · 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: 0.010 (62.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Reddoxx Maildepot — versions 2033

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

packetstormsecurity.com/files/160077/MailDepot-2033-2.3.3022-Cross-Site-Scripti… (Exploit, VDB Entry, Third Party Advisory)
www.syss.de/pentest-blog/syss-2020-037-persistent-cross-site-scripting-schwachs… (Third Party Advisory)

Frequently asked questions

What is CVE-2020-26554?: CVE-2020-26554 is a medium-severity vulnerability in Reddoxx Maildepot, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-11-18.
How severe is CVE-2020-26554?: Medium severity. CVSS v3 base score is 6.1 out of 10.