How severe is CVE-2017-15878?

CVE-2017-15878 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-2017-15878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15878?

CVE-2017-15878 affects Keystonejs Keystone. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-15878?

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

When was CVE-2017-15878 published?

CVE-2017-15878 was published on 2017-10-24 and last updated on 2026-06-17.

CVE-2017-15878

CVE-2017-15878 is a medium-severity vulnerability in Keystonejs Keystone 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: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Keystonejs Keystone
Published: 2017-10-24
Last modified: 2026-06-17

Description

A cross-site scripting (XSS) vulnerability exists in fields/types/markdown/MarkdownType.js in KeystoneJS before 4.0.0-beta.7 via the Contact Us feature.

Frequently asked questions

What is CVE-2017-15878?: A cross-site scripting (XSS) vulnerability exists in fields/types/markdown/MarkdownType.js in KeystoneJS before 4.0.0-beta.7 via the Contact Us feature.
How severe is CVE-2017-15878?: CVE-2017-15878 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-2017-15878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15878?: CVE-2017-15878 affects Keystonejs Keystone. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-15878?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-15878 published?: CVE-2017-15878 was published on 2017-10-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:keystonejs:keystone:*:beta7:*:*:*:*:*:*

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