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.
References (5)
Core 5
Core References
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/99242
Vendor Advisory x_refsource_confirm
https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8
Permissions Required x_refsource_misc
https://hackerone.com/reports/215890
Vendor Advisory x_refsource_confirm
https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5
Vendor Advisory x_refsource_confirm
https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released
Scores
CVSS v3
7.5
EPSS
0.0404
EPSS Percentile
89.3%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-330
CWE-331
Status
published
Products (50)
EllisLab/ExpressionEngine
Versions before 2.11.8 and 3.5.5
expressionengine/expressionengine
2.0.0 public_beta
expressionengine/expressionengine
2.0.1 public_beta
expressionengine/expressionengine
2.0.2 public_beta
expressionengine/expressionengine
2.1.0
expressionengine/expressionengine
2.1.1
expressionengine/expressionengine
2.1.2
expressionengine/expressionengine
2.1.3
expressionengine/expressionengine
2.1.4
expressionengine/expressionengine
2.1.5
... and 40 more
Published
Jun 22, 2017
Tracked Since
Feb 18, 2026