CVE-2015-2947: KanColleViewer versions 3.8.1 and earlier operates as an open proxy which allows remote attackers to trigger o

Q: How do I fix CVE-2015-2947?

kancolleviewer: upgrade to newer than 3.8.1. Exact commands for each OS are on this page.

Q: Is CVE-2015-2947 being exploited?

CVE-2015-2947 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-2015-2947 affect?

CVE-2015-2947 affects kancolleviewer. Severity is critical (CVSS 9.1). KanColleViewer versions 3.8.1 and earlier operates as an open proxy which allows remote attackers to trigger outbound network traffic.

Q: How urgent is CVE-2015-2947?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2015-2947 is a critical-severity flaw (CVSS 9.1) affecting kancolleviewer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

KanColleViewer versions 3.8.1 and earlier operates as an open proxy which allows remote attackers to trigger outbound network traffic.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-441
Published	2017-04-13
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: grabacr.net

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

Am I affected?

Timeline

2017-04-13 17:59 UTCPublished CVE record published
2026-06-17 00:25 UTCUpdated Record last modified

grabacr.net kancolleviewer UPGRADE

Affected: <= 3.8.1

Fixed in: newer than 3.8.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.8.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kancolleviewer

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-2015-2947?

kancolleviewer: upgrade to newer than 3.8.1. Exact commands for each OS are on this page.

Is CVE-2015-2947 being exploited?

CVE-2015-2947 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-2015-2947 affect?

CVE-2015-2947 affects kancolleviewer. Severity is critical (CVSS 9.1). KanColleViewer versions 3.8.1 and earlier operates as an open proxy which allows remote attackers to trigger outbound network traffic.

How urgent is CVE-2015-2947?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

References

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