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CVE-2017-0897
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…
High7.5EPSS 4.0%
- Published
- Updated
- Reserved
- Assigned by
- hackerone
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.
Timeline
ID reserved
By hackerone
- 7 months later
· 7 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 4.0% · top 9.3% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected Versions before 2.11.8 and 3.5.5
References (5)
- 99242 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://hackerone.com/reports/215890 (opens in a new tab)x_refsource_MISCx_transferred
- https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2017-0897)Record last updated .