HOMEVULNERABILITIESCVE-2017-0897
HIGH

CVE-2017-0897

CWE-330Published: June 22, 2017· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-0897 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

expressionengine1 product(s)
expressionengine
Source: NVD CPE · 77 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.securityfocus.com/bid/99242
ADVISORYhttps://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5
ADVISORYhttps://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8
ADVISORYhttps://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released
ADVISORYhttp://www.securityfocus.com/bid/99242
ADVISORYhttps://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5
ADVISORYhttps://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8
ADVISORYhttps://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released

All References (10)

→
http://www.securityfocus.com/bid/99242Third Party Advisory · VDB Entry
→
https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5Vendor Advisory
→
https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8Vendor Advisory
→
https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-releasedVendor Advisory
→
https://hackerone.com/reports/215890Permissions Required
→
http://www.securityfocus.com/bid/99242Third Party Advisory · VDB Entry
→
https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5Vendor Advisory
→
https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8Vendor Advisory
→
https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-releasedVendor Advisory
→
https://hackerone.com/reports/215890Permissions Required

Quick Facts

CVE IDCVE-2017-0897
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-330
CISA KEVNo
Affected1 vendor(s)
PublishedJun 22, 2017

Related CVEs (CWE-330)

CVE-2019-16674
9.8
CVE-2014-6311
9.8
CVE-2019-7667
9.8
CVE-2019-15130
9.8
CVE-2019-2294
9.8
CVE-2019-2317
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-0897 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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