What is CVE-2018-5753?

CVE-2018-5753 is a medium-severity vulnerability in Open-Xchange Appsuite, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2018-06-16.

How severe is CVE-2018-5753?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Open-Xchange Appsuite

CVE-2018-5753

The frontend component in Open-Xchange OX App Suite before 7.6.3-rev31, 7.8.x before 7.8.2-rev31, 7.8.3 before 7.8.3-rev41, and 7.8.4 before 7.8.4-rev20 allows remote attackers to spoof the origin of e-mails via unicode characters in the "personal part" of a (1) From or (2) Sender address.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-06-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.083 (94.8th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.076 · newest: 0.083 · change: +0.007

Affected products

Open-Xchange Appsuite — versions 7.6.3, 7.8.0, 7.8.2

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

packetstormsecurity.com/files/148118/OX-App-Suite-7.8.4-XSS-Privilege-Managemen… (Exploit, VDB Entry, Third Party Advisory)
www.exploit-db.com/exploits/44881/ (Exploit, VDB Entry, Third Party Advisory, exploit)
seclists.org/fulldisclosure/2018/Jun/23 (mailing-list, Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-5753?: CVE-2018-5753 is a medium-severity vulnerability in Open-Xchange Appsuite, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2018-06-16.
How severe is CVE-2018-5753?: Medium severity. CVSS v3 base score is 6.5 out of 10.