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MEDIUM

CVE-2018-16831

CVSS v3

5.9

MEDIUM

EPSS Score

2.7 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • smarty/smartyPackagistall versions · fixed in 3.1.33

Vendor advisories

  • CVE-2018-16831 Red Hat Product Security

    php-Smarty: trusted_dir protection mechanism bypass

Full record on NVD

Description

Smarty before 3.1.33-dev-4 allows attackers to bypass the trusted_dir protection mechanism via a file:./../ substring in an include statement.

Technical details

Published
2018-09-11

Frequently asked questions

What is CVE-2018-16831?

Smarty before 3.1.33-dev-4 allows attackers to bypass the trusted_dir protection mechanism via a file:./../ substring in an include statement.

Is CVE-2018-16831 actively exploited?

Active exploitation of CVE-2018-16831 has not been confirmed. Its EPSS score was 2.7% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-16831?

CVE-2018-16831 has a CVSS v3 base score of 5.9 (MEDIUM severity).

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