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Vulnerability record · CVE-2017-0897 · published 22 June 2017

CVE-2017-0897: Expressionengine vulnerability

Expressionengine · Expressionengine

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.

7.5 CVSS 3.0 High EPSS 4.0% · top 9.7% CWE-330 · CWE-330CWE-331 · CWE-331
7.5CVSS 3.0 base score, v2 5.0
4.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/99242 Third Party AdvisoryVDB Entry
https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5 Vendor Advisory
https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8 Vendor Advisory
https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released Vendor Advisory
https://hackerone.com/reports/215890 Permissions Required
http://www.securityfocus.com/bid/99242 Third Party AdvisoryVDB Entry
https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5 Vendor Advisory
https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8 Vendor Advisory
https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released Vendor Advisory
https://hackerone.com/reports/215890 Permissions Required

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-0897), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.