CVE-2016-4027

What it is

An issue was discovered in Open-Xchange OX App Suite before 7.8.1-rev10. App Suite frontend offers to control whether a user wants to store cookies that exceed the session duration. This functionality is useful when logging in from clients with reduced privileges or shared environments. However the setting was incorrectly recognized and cookies were stored regardless of this setting when the login was performed using a non-interactive login method. In case the setting was enforced by middleware configuration or the user went through the interactive login page, the workflow was correct. Cookies with authentication information may become available to other users on shared environments. In case the user did not properly log out from the session, third parties with access to the same client can access a user's account.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account, but needs a user to act. Limited direct impact.

Exploit odds

1.1% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2016-12-15 06:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:46 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.1% in the next 30 days (EPSS).
• Severity: 3.5 LOW (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2016-12-15 06:59 UTC

Last modified

2026-06-17 00:46 UTC

Exploit probability

1.1% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• open-xchange Appsuite ≤ 7.8.1

Attack profile CVSS 3.0 · 3.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2016-4027.md and follow it. Check whether this project is affected by CVE-2016-4027. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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