HOMEVULNERABILITIESCVE-2016-5727
HIGH

CVE-2016-5727

CWE-94Published: February 9, 2017· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

LogInOut.php in Simple Machines Forum (SMF) 2.1 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via vectors related to variables derived from user input in a foreach loop.

NVD Source

Technical Analysis

CVE-2016-5727 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

simplemachines1 product(s)
simple machines forum
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2016/06/10/7
PATCHhttp://www.openwall.com/lists/oss-security/2016/06/18/1
PATCHhttps://github.com/SimpleMachines/SMF2.1/commit/19e560b9f3e8fc6d7d9d60c1ff617b5ed5c08008#diff-513c4f9c501cbefcc14420c01848f23c
PATCHhttps://github.com/SimpleMachines/SMF2.1/issues/3522
PATCHhttp://www.openwall.com/lists/oss-security/2016/06/10/7
PATCHhttp://www.openwall.com/lists/oss-security/2016/06/18/1
PATCHhttps://github.com/SimpleMachines/SMF2.1/commit/19e560b9f3e8fc6d7d9d60c1ff617b5ed5c08008#diff-513c4f9c501cbefcc14420c01848f23c
PATCHhttps://github.com/SimpleMachines/SMF2.1/issues/3522

All References (8)

→
http://www.openwall.com/lists/oss-security/2016/06/10/7Mailing List · Patch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/06/18/1Mailing List · Patch · Third Party Advisory
→
https://github.com/SimpleMachines/SMF2.1/commit/19e560b9f3e8fc6d7d9d60c1ff617b5ed5c08008#diff-513c4f9c501cbefcc14420c01848f23cIssue Tracking · Patch · Third Party Advisory
→
https://github.com/SimpleMachines/SMF2.1/issues/3522Issue Tracking · Patch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/06/10/7Mailing List · Patch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/06/18/1Mailing List · Patch · Third Party Advisory
→
https://github.com/SimpleMachines/SMF2.1/commit/19e560b9f3e8fc6d7d9d60c1ff617b5ed5c08008#diff-513c4f9c501cbefcc14420c01848f23cIssue Tracking · Patch · Third Party Advisory
→
https://github.com/SimpleMachines/SMF2.1/issues/3522Issue Tracking · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2016-5727
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-94
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 9, 2017

Related CVEs (CWE-94)

CVE-2021-29475
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CVE-2023-2583
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CVE-2026-57811
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CVE-2026-48836
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CVE-2021-23281
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CVE-2024-32599
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-5727 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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