How severe is CVE-2017-0897?

CVE-2017-0897 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-0897 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-0897?

CVE-2017-0897 primarily affects Expressionengine. In total, 77 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-0897?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-0897 published?

CVE-2017-0897 was published on 2017-06-22 and last updated on 2026-06-17.

CVE-2017-0897

CVE-2017-0897 is a high-severity vulnerability in Expressionengine with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-331.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-331
Affected product: Expressionengine
Published: 2017-06-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 token can lead to remote code execution.
How severe is CVE-2017-0897?: CVE-2017-0897 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-0897 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-0897?: CVE-2017-0897 primarily affects Expressionengine. In total, 77 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-0897?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-0897 published?: CVE-2017-0897 was published on 2017-06-22 and last updated on 2026-06-17.

References

Affected products (77)

cpe:2.3:a:expressionengine:expressionengine:2.0.0:public_beta:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.0.1:public_beta:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.0.2:public_beta:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.1.4:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.1.5:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.3.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.4.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.5.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.5.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.5.2:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.5.3:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.5.4:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.5.5:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.6.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.6.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.7.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.7.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.7.2:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.7.3:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.8.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.8.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.9.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.9.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.9.2:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.9.3:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.10.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.10.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.10.2:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.10.3:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.11.0:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.11.1:*:*:*:*:*:*:*
cpe:2.3:a:expressionengine:expressionengine:2.11.2:*:*:*:*:*:*:*

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