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CVE-2016-5727

26
FAUCET Score

CVE-2016-5727 is a PHP object injection vulnerability in LogInOut.php of Simple Machines Forum (SMF) 2.1, allowing remote attackers to execute arbitrary PHP code. With a CVSSv3 score of 8.8 (High), it presents a significant risk due to its network-based attack vector and high impact on confidentiality, integrity, and availability, though it requires user interaction. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting a low current threat landscape despite its severity.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:simplemachines:simple_machines_forum:2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 71st percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / SimpleMachines/SMF2.1/commit/19e560b9f3e8fc6d7d9d60c1ff617b5ed5c08008
Issue TrackingPatchThird Party Advisory
github.com / SimpleMachines/SMF2.1/issues/3522
Issue TrackingPatchThird Party Advisory
openwall.com / lists/oss-security/2016/06/10/7
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2016/06/18/1
Mailing ListPatchThird Party Advisory