High
Security advisory
Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by crafting a malicious math string. If a math string was passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string. Users should upgrade to version 3.1.42 or 4.0.2 to receive a patch.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-29454
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:44 UTC · Revision 1
Source evidence
Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by crafting a malicious math string. If a math string was passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string. Users should upgrade to version 3.1.42 or 4.0.2 to receive a patch.
osv:CVE-2021-29454
Complete source record
{
"id": "ecd01592fd7d9afd49be734186b4d927cf04707c1924b05290e5b06b0970e71e",
"url": "https://osv.dev/vulnerability/CVE-2021-29454",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-29454",
"summary": "Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by crafting a malicious math string. If a math string was passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string. Users should upgrade to version 3.1.42 or 4.0.2 to receive a patch.",
"evidence": "osv:CVE-2021-29454",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-29454",
"aliases": [
"CVE-2021-29454",
"GHSA-29gp-2c3m-3j6m"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/smarty-php/smarty",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "b674cba13d4ae61f063aec20f84a3ec40c006124"
},
{
"introduced": "baebd59bb4da9fca89da382811b38c8313949c49"
},
{
"fixed": "6f4f06db7ebbad6ae7bc98027d9385e60a016906"
},
{
"fixed": "215d81a9fa3cd63d82fb3ab56ecaf97cf1e7db71"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:smarty:smarty:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.1.42"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:smarty:smarty:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "215d81a9fa3cd63d82fb3ab56ecaf97cf1e7db71"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "b674cba13d4ae61f063aec20f84a3ec40c006124"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v3.1.42"
},
{
"range": [
{
"fixed": "6f4f06db7ebbad6ae7bc98027d9385e60a016906"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v4.0.2"
}
]
}
}
],
"versions": [
"v3.1.41",
"v4.0.1",
"v4.0.0",
"v3.1.40",
"v3.1.39",
"v3.1.38",
"v3.1.37.1",
"v3.1.37",
"v3.1.36",
"v3.1.35",
"v3.1.34",
"v3.1.33",
"v3.1.32",
"v3.1.31",
"v3.1.30",
"v3.1.29",
"v3.1.28",
"v2.6.28",
"v3.1.27",
"v3.1.26",
"v3.1.25",
"v3.1.24",
"v3.1.23",
"v3.1.21",
"v3.1.20",
"v3.1.19",
"v3.1.18",
"v3.1.17",
"v3.1.16",
"v3.1.15",
"v3.1.14",
"v3.1.13",
"v3.1.12",
"v3.1.11",
"v2.6.27",
"v2.6.26",
"v2.6.25",
"v2.6.24"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29454.json"
}
}
],
"modified": "2026-10-20T10:54:37.212015803Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRAJVDRGCIY5UZ2PQHKDTT7RMKG6WJQQ/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L777JIBIWJV34HS7LXPIDWASG7TT4LNI/",
"https://github.com/smarty-php/smarty/releases/tag/v3.1.42",
"https://github.com/smarty-php/smarty/releases/tag/v4.0.2",
"https://github.com/smarty-php/smarty/security/advisories/GHSA-29gp-2c3m-3j6m",
"https://lists.debian.org/debian-lts-announce/2022/05/msg00005.html",
"https://packagist.org/packages/smarty/smarty",
"https://security.gentoo.org/glsa/202209-09",
"https://www.debian.org/security/2022/dsa-5151",
"https://www.smarty.net/docs/en/language.function.math.tpl",
"https://github.com/smarty-php/smarty/commit/215d81a9fa3cd63d82fb3ab56ecaf97cf1e7db71"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
},
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
},
{
"introduced": "11.0"
},
{
"last_affected": "11.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "36"
},
{
"last_affected": "36"
},
{
"introduced": "37"
},
{
"last_affected": "37"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-29454",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 385756,
"published_at": "2022-01-10T20:15:08+00:00"
}