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Vulnerability record · CVE-2016-5727 · published 9 February 2017

CVE-2016-5727: Simplemachines simple machines forum code injection vulnerability

Simplemachines · Simple Machines Forum

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.

8.8 CVSS 3.0 High EPSS 1.5% · top 26.3% CWE-94 · Code injection
8.8CVSS 3.0 base score, v2 6.8
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2016/06/10/7 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/18/1 Mailing ListPatchThird Party Advisory
https://github.com/SimpleMachines/SMF2.1/commit/19e560b9f3e8fc6d7d9d60c1ff617b5ed5c08008#diff-513c4f9c501cbefcc14420c018 Issue TrackingPatchThird Party Advisory
https://github.com/SimpleMachines/SMF2.1/issues/3522 Issue TrackingPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/10/7 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/18/1 Mailing ListPatchThird Party Advisory
https://github.com/SimpleMachines/SMF2.1/commit/19e560b9f3e8fc6d7d9d60c1ff617b5ed5c08008#diff-513c4f9c501cbefcc14420c018 Issue TrackingPatchThird Party Advisory
https://github.com/SimpleMachines/SMF2.1/issues/3522 Issue TrackingPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-5727), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.