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CVE-2016-4843· NVD / CVE Program· CNA jpcert

Cybozu Mailwise before 5.4.0 allows remote attackers to obtain sensitive cookie information.

MediumCVSS 6.5 · v3.0—No exploit No fix recorded
Published
Apr 20, 2017
Updated
Jun 16, 2026
EPSS
1.9% · 79th percentile
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Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.9%

Affected systems

VendorProduct
cybozumailwise

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cybozu mailwise5.0.0
  • cybozu mailwise5.0.1
  • cybozu mailwise5.0.4
  • cybozu mailwise5.0.5
  • cybozu mailwise5.0.6
  • cybozu mailwise5.1.0
  • cybozu mailwise5.1.1
  • cybozu mailwise5.1.2
  • cybozu mailwise5.1.4
  • cybozu mailwise5.2.0
  • cybozu mailwise5.2.1
  • cybozu mailwise5.3.0
  • cybozu mailwise5.3.1
  • cybozu mailwise5.3.2

Same product

cybozu: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-0702Directory traversal vulnerability in Cybozu Mailwise 5.0.0 to 5.4.5 allows remote attackers to delete arbitrary files via unspecified vector
    31Monitor
  • CVE-2018-0559Cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject arbitrary web script or HTML 'Address
    24Monitor
  • CVE-2018-0558Reflected cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject arbitrary web script or HTM
    24Monitor
  • CVE-2018-0557Stored cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject arbitrary web script or HTML '
    24Monitor
  • CVE-2020-5572Android App 'Mailwise for Android' 1.0.0 to 1.0.1 allows an attacker to obtain credential information registered in the product via unspecif
    18Monitor
  • CVE-2016-4841Cybozu Mailwise before 5.4.0 allows remote attackers to inject arbitrary email headers.
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records