What is CVE-2017-6377?

CVE-2017-6377 is a high-severity vulnerability in Drupal, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2017-03-16.

How severe is CVE-2017-6377?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Drupal

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.

Vulnerability class: Broken Access Control

Published 2017-03-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.019 (79.2th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Drupal — versions 8.2.0, 8.2.1, 8.2.2
Drupal Core — versions 8.2.x versions before 8.2.7

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.securitytracker.com/id/1038058 (vdb-entry)
www.drupal.org/SA-2017-001 (Vendor Advisory)
www.securityfocus.com/bid/96919 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-6377?: CVE-2017-6377 is a high-severity vulnerability in Drupal, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2017-03-16.
How severe is CVE-2017-6377?: High severity. CVSS v3 base score is 7.5 out of 10.