How severe is CVE-2017-6377?

CVE-2017-6377 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 none, integrity high, and availability none.

Is CVE-2017-6377 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-6377?

CVE-2017-6377 primarily affects Drupal. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-6377?

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-2017-6377 published?

CVE-2017-6377 was published on 2017-03-16 and last updated on 2026-06-17.

CVE-2017-6377

CVE-2017-6377 is a high-severity vulnerability in Drupal 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Drupal
Published: 2017-03-16
Last modified: 2026-06-17

Description

When adding a private file via the editor in Drupal 8.2.x before 8.2.7, the editor will not correctly check access for the file being attached, resulting in an access bypass.

Frequently asked questions

What is CVE-2017-6377?: When adding a private file via the editor in Drupal 8.2.x before 8.2.7, the editor will not correctly check access for the file being attached, resulting in an access bypass.
How severe is CVE-2017-6377?: CVE-2017-6377 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 none, integrity high, and availability none.
Is CVE-2017-6377 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-6377?: CVE-2017-6377 primarily affects Drupal. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-6377?: 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-2017-6377 published?: CVE-2017-6377 was published on 2017-03-16 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:a:drupal:drupal:8.2.0:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.0:beta1:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.0:beta2:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.0:beta3:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.0:rc2:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.1:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.2:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.3:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.4:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.5:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:8.2.6:*:*:*:*:*:*:*

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