Template authors could inject php code by choosing a malicous {function} name. Sites that cannot fully trust template authors should update as soon as possible. Please upgrade to 3.1.39 or higher.

References

• GHSA-3rpf-5rqv-689q
• https://nvd.nist.gov/vuln/detail/CVE-2021-26120
• smarty-php/smarty@165f1bd
• https://github.com/smarty-php/smarty/blob/master/CHANGELOG.md#3139---2021-02-17
• https://srcincite.io/blog/2021/02/18/smarty-template-engine-multiple-sandbox-escape-vulnerabilities.html
• https://github.com/smarty-php/smarty/blob/master/CHANGELOG.md
• https://lists.debian.org/debian-lts-announce/2021/04/msg00004.html
• https://lists.debian.org/debian-lts-announce/2021/04/msg00014.html
• https://security.gentoo.org/glsa/202105-06
• https://www.debian.org/security/2022/dsa-5151
• https://github.com/FriendsOfPHP/security-advisories/blob/master/smarty/smarty/CVE-2021-26120.yaml