CVE-2016-6174: applications/core/modules/front/system/content.php in Invision Power Services IPS Community Suite (aka Invisio

Q: How do I fix CVE-2016-6174?

invision power board: upgrade to newer than 4.1.12.3; php: upgrade to newer than 5.4.23. Exact commands for each OS are on this page.

Q: Is CVE-2016-6174 being exploited?

CVE-2016-6174 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-2016-6174 affect?

CVE-2016-6174 affects invision power board, php. Severity is high (CVSS 8.1). applications/core/modules/front/system/content.php in Invision Power Services IPS Community Suite (aka Invision Power Board, IPB, or Power Board) before 4.1.13, when used with PHP before 5.4.24 or 5.5.x before 5.5.8, allows remote attackers

Q: How urgent is CVE-2016-6174?

Priority 62/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADEUPGRADE

CVE-2016-6174 is a high-severity flaw (CVSS 8.1) affecting invision power board, php. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

applications/core/modules/front/system/content.php in Invision Power Services IPS Community Suite (aka Invision Power Board, IPB, or Power Board) before 4.1.13, when used with PHP before 5.4.24 or 5.5.x before 5.5.8, allows remote attackers to execute arbitrary code via the content_class parameter.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	12.3% (top 4%)
CISA exploited list	No
Published	2016-07-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: invisioncommunity · php

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

Am I affected?

Timeline

2016-07-12 19:59 UTCPublished CVE record published
2026-06-17 00:50 UTCUpdated Record last modified

invisioncommunity invision power board UPGRADE

Affected: <= 4.1.12.3

Fixed in: newer than 4.1.12.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy invision-power-board || rpm -q invision-power-board || invision-power-board --version

2. UPGRADE to newer than 4.1.12.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade invision-power-board

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade invision-power-board

Note

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

php php UPGRADE

Affected: <= 5.4.23 · 5.5.0 · 5.5.0 alpha1 · 5.5.0 alpha2 · 5.5.0 alpha3 · 5.5.0 alpha4 · 5.5.0 alpha5 · 5.5.0 alpha6

Fixed in: newer than 5.4.23

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 5.4.23 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade php

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: IPS Community Suite 4.1.12.3 - PHP Code Injection

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-2016-6174?

invision power board: upgrade to newer than 4.1.12.3; php: upgrade to newer than 5.4.23. Exact commands for each OS are on this page.

Is CVE-2016-6174 being exploited?

CVE-2016-6174 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-2016-6174 affect?

CVE-2016-6174 affects invision power board, php. Severity is high (CVSS 8.1). applications/core/modules/front/system/content.php in Invision Power Services IPS Community Suite (aka Invision Power Board, IPB, or Power Board) before 4.1.13, when used with PHP before 5.4.24 or 5.5.x before 5.5.8, allows remote attackers

How urgent is CVE-2016-6174?

Priority 62/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-39250 MEDIUM 5.4 UPGRADE Invision Community (aka IPS Community Suite or IP-Board) before 4.6.5.1 allows stored XSS, with resultant code
CVE-2021-39249 MEDIUM 6.1 UPGRADE Invision Community (aka IPS Community Suite or IP-Board) before 4.6.5.1 allows reflected XSS because the filen
CVE-2019-8278 MEDIUM 6.1 UPGRADE Stored XSS in Invision Power Board versions 3.3.1 - 3.4.8 leads to Remote Code Execution.
CVE-2017-8899 HIGH 8.1 UPGRADE Invision Power Services (IPS) Community Suite 4.1.19.2 and earlier has a composite of Stored XSS and Informati
CVE-2017-8898 CRITICAL 9.8 UPGRADE Invision Power Services (IPS) Community Suite 4.1.19.2 and earlier has stored XSS in the Announcements, allowi

References

← Back to latest CVEs