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CVE-2018-16831

22
FAUCET Score

CVE-2018-16831 describes a path traversal vulnerability in Smarty versions prior to 3.1.33-dev-4, allowing attackers to bypass the trusted_dir protection mechanism through a crafted include statement. This medium-severity vulnerability (CVSS 5.9) has a high impact on confidentiality, as it allows unauthorized access to files, but requires high attack complexity. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, <= 3.1.32CPE matchmatch criteria
cpe:2.3:a:smarty:smarty:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.66%
Probability of exploitation in next 30 days
EPSS Percentile
84.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0266 is in the 75th percentile among its peer group of 19,958 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: smarty/smartyFixed in: 3.1.33

Vendor Advisories (1)

composerGHSA-65j5-vpm7-6xp4medium

Smarty Path Traversal Vulnerability

May 14, 2022

References

github.com / smarty-php/smarty/issues/486
ExploitThird Party Advisory