How severe is CVE-2016-4844?

CVE-2016-4844 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2016-4844 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4844?

CVE-2016-4844 primarily affects Cybozu Mailwise. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4844?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-4844 published?

CVE-2016-4844 was published on 2017-04-20 and last updated on 2026-06-17.

CVE-2016-4844

CVE-2016-4844 is a medium-severity vulnerability in Cybozu Mailwise with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Cybozu Mailwise
Published: 2017-04-20
Last modified: 2026-06-17

Description

Cybozu Mailwise before 5.4.0 allows remote attackers to conduct clickjacking attacks.

Frequently asked questions

What is CVE-2016-4844?: Cybozu Mailwise before 5.4.0 allows remote attackers to conduct clickjacking attacks.
How severe is CVE-2016-4844?: CVE-2016-4844 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2016-4844 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4844?: CVE-2016-4844 primarily affects Cybozu Mailwise. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-4844?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4844 published?: CVE-2016-4844 was published on 2017-04-20 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:a:cybozu:mailwise:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.4:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.5:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.6:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.2:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.4:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.2.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.3.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.3.2:*:*:*:*:*:*:*

More vulnerabilities in Cybozu Mailwise

CVE-2014-5314 — Critical (CVSS 9.0): Buffer overflow in Cybozu Office 9 and 10 before 10.1.0, Mailwise 4 and 5 before 5.1.4, and Dezie 8 before 8.1.1 allows…
CVE-2018-0702 — High (CVSS 7.5): Directory traversal vulnerability in Cybozu Mailwise 5.0.0 to 5.4.5 allows remote attackers to delete arbitrary files…
CVE-2013-2305 — Medium (CVSS 6.8): Cross-site request forgery (CSRF) vulnerability in Cybozu Office before 8.1.6 and 9.x before 9.3.0, Cybozu Dezie before…
CVE-2016-4843 — Medium (CVSS 6.5): Cybozu Mailwise before 5.4.0 allows remote attackers to obtain sensitive cookie information.
CVE-2018-0559 — Medium (CVSS 6.1): Cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject arbitrary web…
CVE-2018-0558 — Medium (CVSS 6.1): Reflected cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject…

All CVEs affecting Cybozu Mailwise →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →