What is CVE-2018-5751?

CVE-2018-5751 is a medium-severity vulnerability in Open-Xchange Appsuite, classified under Information Disclosure. CVSS score: 6.5/10. Published 2018-06-16.

How severe is CVE-2018-5751?

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

Information disclosure in Open-Xchange Appsuite

CVE-2018-5751

The backend component in Open-Xchange OX App Suite before 7.6.3-rev36, 7.8.x before 7.8.2-rev39, 7.8.3 before 7.8.3-rev44, and 7.8.4 before 7.8.4-rev22 allows remote authenticated users to obtain sensitive information about external guest users via vectors related to the "groups" and "users" APIs.

Vulnerability class: Information Disclosure

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:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.091 (95.2th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.078 · newest: 0.091 · change: +0.013

Affected products

Open-Xchange Appsuite — versions 7.6.3, 7.8.0, 7.8.2

Weakness classification (CWE)

CWE-200 — Information Disclosure

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-2018-5751?: CVE-2018-5751 is a medium-severity vulnerability in Open-Xchange Appsuite, classified under Information Disclosure. CVSS score: 6.5/10. Published 2018-06-16.
How severe is CVE-2018-5751?: Medium severity. CVSS v3 base score is 6.5 out of 10.