CVE-2016-6190: SOGo before 2.3.12 and 3.x before 3.1.1 does not restrict access to the UID and DTSTAMP attributes, which allo

Q: How do I fix CVE-2016-6190?

sogo: upgrade to newer than 2.3.11. Exact commands for each OS are on this page.

Q: Is CVE-2016-6190 being exploited?

CVE-2016-6190 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-6190 affect?

CVE-2016-6190 affects sogo. Severity is medium (CVSS 4.3). SOGo before 2.3.12 and 3.x before 3.1.1 does not restrict access to the UID and DTSTAMP attributes, which allows remote authenticated users to obtain sensitive information about appointments with the "View the Date & Time" restriction, as d

Q: How urgent is CVE-2016-6190?

Priority 32/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2016-6190 is a medium-severity flaw (CVSS 4.3) affecting sogo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SOGo before 2.3.12 and 3.x before 3.1.1 does not restrict access to the UID and DTSTAMP attributes, which allows remote authenticated users to obtain sensitive information about appointments with the "View the Date & Time" restriction, as demonstrated by correlating UIDs and DTSTAMPs between all users.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-200
Published	2017-02-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: inverse-inc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-02-17 17:59 UTCPublished CVE record published
2026-06-17 00:50 UTCUpdated Record last modified

inverse-inc sogo UPGRADE

Affected: <= 2.3.11 · 3.0.0 · 3.0.0 beta_1 · 3.0.0 beta_2 · 3.0.0 beta_3 · 3.0.0 beta_4 · 3.0.0 beta_5 · 3.0.1

Fixed in: newer than 2.3.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sogo || rpm -q sogo || sogo --version

2. UPGRADE to newer than 2.3.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sogo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sogo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-6190?

sogo: upgrade to newer than 2.3.11. Exact commands for each OS are on this page.

Is CVE-2016-6190 being exploited?

CVE-2016-6190 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-6190 affect?

CVE-2016-6190 affects sogo. Severity is medium (CVSS 4.3). SOGo before 2.3.12 and 3.x before 3.1.1 does not restrict access to the UID and DTSTAMP attributes, which allows remote authenticated users to obtain sensitive information about appointments with the "View the Date & Time" restriction, as d

How urgent is CVE-2016-6190?

Priority 32/100. No elevated risk signals yet.

Related CVEs

CVE-2025-63499 MEDIUM 6.1 UPGRADE Alinto Sogo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the theme parameter.
CVE-2026-3054 MEDIUM 4.3 DOWNGRADE A vulnerability was identified in Alinto SOGo 5.12.3/5.12.4
CVE-2026-33550 LOW 2.0 UPGRADE SOGo before 5.12.5 does not renew the OTP if a user disables/enables it, and has a too short length (only 12 d
CVE-2025-71276 MEDIUM 6.4 UPGRADE SOGo before 5.12.5 is prone to a XSS vulnerability with events, tasks, and contacts categories.
CVE-2025-63498 MEDIUM 6.1 DOWNGRADE MITIGATE alinto SOGo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the "userName" parameter.

References

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