CVE-2017-0897 json
ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy.
published 2017-06-22 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-1250
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.0%
- EPSS 4.0% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
4.04% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- EllisLab ExpressionEngine
Classification
References
-
docs.expressionengine.com
/v2/about/changelog.html#version-2-11-8
vendor-advisory
-
docs.expressionengine.com
/latest/about/changelog.html#version-3-5-5
vendor-advisory
-
expressionengine.com
/blog/expressionengine-3.5.5-and-2.11.8-released
vendor-advisory
-
securityfocus.com
/bid/99242
vdb-entry, third-party-advisory
-
hackerone.com
/reports/215890
permissions-required
Sources
- CVE List CVE-2017-0897
- NVD CVE-2017-0897
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.