{"id":"CVE-2017-0897","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-0897","generatedAt":"2026-10-29T00:33:11.444Z","title":"ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy.","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.","published":"2017-06-22T21:29:00.000Z","lastModified":"2026-06-17T00:58:29.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-330","CWE-331"],"affected":["expressionengine/expressionengine"],"epss":{"score":0.04042,"percentile":0.90565,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.04%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/99242","tags":["Third Party Advisory","VDB Entry"],"source":"support@hackerone.com"},{"url":"https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5","tags":["Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8","tags":["Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released","tags":["Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/215890","tags":["Permissions Required"],"source":"support@hackerone.com"},{"url":"http://www.securityfocus.com/bid/99242","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/215890","tags":["Permissions Required"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-0897","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}