CVE-2016-4427
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
- Record
CVE-2016-4427- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-284
- Updated
- 2026-11-02
CVE List No score
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
- Record
CVE-2016-4427- Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2016-5426 No score
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
- Record
EUVD-2016-5426- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-58ww-8hxm-f99f
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
- Record
GHSA-58ww-8hxm-f99f- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSV
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
- Record
CVE-2016-4427- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-4427 is a high vulnerability (CVSS 7.5) in Zulip, published July 28, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. No source names a fixed version.