What’s Vulnerable › Vulnerabilities

CVE-2017-0897

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-06-22 · updated 2026-06-17
• Weakness: CWE-330

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.

Affected products

• ExpressionEngine: 2.0.0-public_beta, 2.0.1-public_beta, 2.0.2-public_beta, 2.1.0, 2.1.1, 2.1.2 (+71)

References

• http://www.securityfocus.com/bid/99242
• 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
• http://www.securityfocus.com/bid/99242
• 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

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