High
Security advisory
ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy. Successfully guessing the token can lead to remote code execution.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-0897
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:21 UTC · Revision 1
Source evidence
ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy. Successfully guessing the token can lead to remote code execution.
osv:CVE-2017-0897
Complete source record
{
"id": "d7ccee6b6e0d2b055b6eb35e019f3de71f51e4786fab50d634ed911094a3b2aa",
"url": "https://osv.dev/vulnerability/CVE-2017-0897",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-0897",
"summary": "ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy. Successfully guessing the token can lead to remote code execution.",
"evidence": "osv:CVE-2017-0897",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2017-0897",
"aliases": [
"CVE-2017-0897"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/expressionengine/expressionengine",
"type": "GIT",
"events": [
{
"introduced": "0017bb5add82250eb8f3fa8252c38590e0989d38"
},
{
"last_affected": "5f9a3afc6edc901323cf4240d3040ec42628de65"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:expressionengine:expressionengine:2.10.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.10.1"
},
{
"last_affected": "2.10.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:expressionengine:expressionengine:3.5.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.5.1"
},
{
"last_affected": "3.5.1"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"2.10.1",
"3.5.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-0897.json"
}
}
],
"modified": "2026-10-24T10:30:52.195311857Z",
"provider": "osv",
"references": [
"https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5",
"https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8",
"https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released",
"https://hackerone.com/reports/215890"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:expressionengine:expressionengine:2.0.0:public_beta:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.0.1:public_beta:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.0.2:public_beta:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.1.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.1.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.1.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.1.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.1.4:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.1.5:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.10.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.10.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.10.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.4:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.5:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.6:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.11.7:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.2.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.2.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.2.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.3.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.3.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.4.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.5.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.5.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.5.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.5.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.5.4:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.5.5:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.6.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.6.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.7.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.7.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.7.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.7.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.8.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.8.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.9.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.9.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.9.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:2.9.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.0.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.0.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.0.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.0.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.0.4:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.0.5:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.0.6:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.1.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.1.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.1.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.1.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.1.4:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.2.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.2.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.3.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.3.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.3.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.3.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.3.4:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.1:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.4:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.5:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.6:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.4.7:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.5.0:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.5.2:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.5.3:*:*:*:*:*:*:*",
"cpe:2.3:a:expressionengine:expressionengine:3.5.4:*:*:*:*:*:*:*"
],
"vendor_product": "expressionengine:expressionengine",
"extracted_events": [
{
"range": [
{
"introduced": "2.0.0-public_beta"
},
{
"last_affected": "2.0.0-public_beta"
},
{
"introduced": "2.0.1-public_beta"
},
{
"last_affected": "2.0.1-public_beta"
},
{
"introduced": "2.0.2-public_beta"
},
{
"last_affected": "2.0.2-public_beta"
},
{
"introduced": "2.1.0"
},
{
"last_affected": "2.1.0"
},
{
"introduced": "2.1.1"
},
{
"last_affected": "2.1.1"
},
{
"introduced": "2.1.2"
},
{
"last_affected": "2.1.2"
},
{
"introduced": "2.1.3"
},
{
"last_affected": "2.1.3"
},
{
"introduced": "2.1.4"
},
{
"last_affected": "2.1.4"
},
{
"introduced": "2.1.5"
},
{
"last_affected": "2.1.5"
},
{
"introduced": "2.2.0"
},
{
"last_affected": "2.2.0"
},
{
"introduced": "2.2.1"
},
{
"last_affected": "2.2.1"
},
{
"introduced": "2.2.2"
},
{
"last_affected": "2.2.2"
},
{
"introduced": "2.3.0"
},
{
"last_affected": "2.3.0"
},
{
"introduced": "2.3.1"
},
{
"last_affected": "2.3.1"
},
{
"introduced": "2.4.0"
},
{
"last_affected": "2.4.0"
},
{
"introduced": "2.5.0"
},
{
"last_affected": "2.5.0"
},
{
"introduced": "2.5.1"
},
{
"last_affected": "2.5.1"
},
{
"introduced": "2.5.2"
},
{
"last_affected": "2.5.2"
},
{
"introduced": "2.5.3"
},
{
"last_affected": "2.5.3"
},
{
"introduced": "2.5.4"
},
{
"last_affected": "2.5.4"
},
{
"introduced": "2.5.5"
},
{
"last_affected": "2.5.5"
},
{
"introduced": "2.6.0"
},
{
"last_affected": "2.6.0"
},
{
"introduced": "2.6.1"
},
{
"last_affected": "2.6.1"
},
{
"introduced": "2.7.0"
},
{
"last_affected": "2.7.0"
},
{
"introduced": "2.7.1"
},
{
"last_affected": "2.7.1"
},
{
"introduced": "2.7.2"
},
{
"last_affected": "2.7.2"
},
{
"introduced": "2.7.3"
},
{
"last_affected": "2.7.3"
},
{
"introduced": "2.8.0"
},
{
"last_affected": "2.8.0"
},
{
"introduced": "2.8.1"
},
{
"last_affected": "2.8.1"
},
{
"introduced": "2.9.0"
},
{
"last_affected": "2.9.0"
},
{
"introduced": "2.9.1"
},
{
"last_affected": "2.9.1"
},
{
"introduced": "2.9.2"
},
{
"last_affected": "2.9.2"
},
{
"introduced": "2.9.3"
},
{
"last_affected": "2.9.3"
},
{
"introduced": "2.10.0"
},
{
"last_affected": "2.10.0"
},
{
"introduced": "2.10.2"
},
{
"last_affected": "2.10.2"
},
{
"introduced": "2.10.3"
},
{
"last_affected": "2.10.3"
},
{
"introduced": "2.11.0"
},
{
"last_affected": "2.11.0"
},
{
"introduced": "2.11.1"
},
{
"last_affected": "2.11.1"
},
{
"introduced": "2.11.2"
},
{
"last_affected": "2.11.2"
},
{
"introduced": "2.11.3"
},
{
"last_affected": "2.11.3"
},
{
"introduced": "2.11.4"
},
{
"last_affected": "2.11.4"
},
{
"introduced": "2.11.5"
},
{
"last_affected": "2.11.5"
},
{
"introduced": "2.11.6"
},
{
"last_affected": "2.11.6"
},
{
"introduced": "2.11.7"
},
{
"last_affected": "2.11.7"
},
{
"introduced": "3.0.0"
},
{
"last_affected": "3.0.0"
},
{
"introduced": "3.0.1"
},
{
"last_affected": "3.0.1"
},
{
"introduced": "3.0.2"
},
{
"last_affected": "3.0.2"
},
{
"introduced": "3.0.3"
},
{
"last_affected": "3.0.3"
},
{
"introduced": "3.0.4"
},
{
"last_affected": "3.0.4"
},
{
"introduced": "3.0.5"
},
{
"last_affected": "3.0.5"
},
{
"introduced": "3.0.6"
},
{
"last_affected": "3.0.6"
},
{
"introduced": "3.1.0"
},
{
"last_affected": "3.1.0"
},
{
"introduced": "3.1.1"
},
{
"last_affected": "3.1.1"
},
{
"introduced": "3.1.2"
},
{
"last_affected": "3.1.2"
},
{
"introduced": "3.1.3"
},
{
"last_affected": "3.1.3"
},
{
"introduced": "3.1.4"
},
{
"last_affected": "3.1.4"
},
{
"introduced": "3.2.0"
},
{
"last_affected": "3.2.0"
},
{
"introduced": "3.2.1"
},
{
"last_affected": "3.2.1"
},
{
"introduced": "3.3.0"
},
{
"last_affected": "3.3.0"
},
{
"introduced": "3.3.1"
},
{
"last_affected": "3.3.1"
},
{
"introduced": "3.3.2"
},
{
"last_affected": "3.3.2"
},
{
"introduced": "3.3.3"
},
{
"last_affected": "3.3.3"
},
{
"introduced": "3.3.4"
},
{
"last_affected": "3.3.4"
},
{
"introduced": "3.4.0"
},
{
"last_affected": "3.4.0"
},
{
"introduced": "3.4.1"
},
{
"last_affected": "3.4.1"
},
{
"introduced": "3.4.2"
},
{
"last_affected": "3.4.2"
},
{
"introduced": "3.4.3"
},
{
"last_affected": "3.4.3"
},
{
"introduced": "3.4.4"
},
{
"last_affected": "3.4.4"
},
{
"introduced": "3.4.5"
},
{
"last_affected": "3.4.5"
},
{
"introduced": "3.4.6"
},
{
"last_affected": "3.4.6"
},
{
"introduced": "3.4.7"
},
{
"last_affected": "3.4.7"
},
{
"introduced": "3.5.0"
},
{
"last_affected": "3.5.0"
},
{
"introduced": "3.5.2"
},
{
"last_affected": "3.5.2"
},
{
"introduced": "3.5.3"
},
{
"last_affected": "3.5.3"
},
{
"introduced": "3.5.4"
},
{
"last_affected": "3.5.4"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2017-0897",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 437645,
"published_at": "2017-06-22T21:29:00.183+00:00"
}