CVE-2016-4427
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
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 56th percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 3.1, NVD
- Exploit chance
- 0.77%EPSS, 56th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
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
Affected products
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 ListNo 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-2016-5426No 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
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.