CVE-2017-0897

7.5 highEPSS 4.0%

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.

Severity

CVSS 3.0

7.5 high

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

EPSS: 4.0% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWEs: CWE-331, CWE-330
Published: 2017-06-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

expressionengine:expressionengine

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

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