What is CVE-2017-8777?

CVE-2017-8777 is a high-severity vulnerability in Open-Xchange Ox Cloud, classified under Improper Authorization. CVSS score: 7.2/10. Published 2019-05-22.

How severe is CVE-2017-8777?

High severity. CVSS v3 base score is 7.2 out of 10.

Auth bypass in Open-Xchange Ox Cloud

CVE-2017-8777

Open-Xchange GmbH OX Cloud Plugins 1.4.0 and earlier is affected by: Missing Authorization.

Published 2019-05-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: -0.000

Affected products

Open-Xchange Ox Cloud

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

ox.com (Not Applicable)
open-xchange.com (Vendor Advisory)
software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release… (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2017-8777?: CVE-2017-8777 is a high-severity vulnerability in Open-Xchange Ox Cloud, classified under Improper Authorization. CVSS score: 7.2/10. Published 2019-05-22.
How severe is CVE-2017-8777?: High severity. CVSS v3 base score is 7.2 out of 10.