How severe is CVE-2017-8440?

CVE-2017-8440 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-8440 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8440?

CVE-2017-8440 primarily affects Elastic Kibana. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-8440?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-8440 published?

CVE-2017-8440 was published on 2017-06-05 and last updated on 2026-06-17.

CVE-2017-8440

CVE-2017-8440 is a medium-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Elastic Kibana
Published: 2017-06-05
Last modified: 2026-06-17

Description

Starting in version 5.3.0, Kibana had a cross-site scripting (XSS) vulnerability in the Discover page that could allow an attacker to obtain sensitive information from or perform destructive actions on behalf of other Kibana users.

Frequently asked questions

What is CVE-2017-8440?: Starting in version 5.3.0, Kibana had a cross-site scripting (XSS) vulnerability in the Discover page that could allow an attacker to obtain sensitive information from or perform destructive actions on behalf of other Kibana users.
How severe is CVE-2017-8440?: CVE-2017-8440 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-8440 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8440?: CVE-2017-8440 primarily affects Elastic Kibana. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-8440?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8440 published?: CVE-2017-8440 was published on 2017-06-05 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:elastic:kibana:5.3.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:kibana:5.3.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:kibana:5.3.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:kibana:5.4.0:*:*:*:*:*:*:*

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