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CVE-2017-6928

Drupal access bypass vulnerability

5.3 MediumFix available

CVE-2017-6928 is a medium vulnerability (CVSS 5.3) in Drupal, published February 24, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.02%, the 63rd percentile. Fixed in drupal/core 7.57.

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

1.02%Up 0.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.3

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Record
CVE-2017-6928
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
3.5 LowAV:N/AC:M/Au:S/C:P/I:N/A:N
Weakness
CWE-732
Updated
2026-11-02
CVE List No score

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Record
CVE-2017-6928
Updated
2026-11-02
EUVDEUVD-2022-2727 No score

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Record
EUVD-2022-2727
Updated
2026-11-03
GitHub AdvisoriesGHSA-66mv-q8r2-hj8w 5.3

Drupal access bypass vulnerability

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Record
GHSA-66mv-q8r2-hj8w
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-732
Updated
2026-11-02
OSV 5.3

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Record
CVE-2017-6928
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVGHSA-66mv-q8r2-hj8w 5.3

Drupal access bypass vulnerability

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Record
GHSA-66mv-q8r2-hj8w
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-732
Updated
2026-11-02
OSVUBUNTU-CVE-2017-6928 5.3

Drupal core 7.x versions before 7.57 when using Drupal's private file system, Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it, leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

Record
UBUNTU-CVE-2017-6928
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
drupal/core
Packagist
7.0 up to 7.57
7.57
drupal/drupal
Packagist
7.0 up to 7.57
7.57
drupal7
Debian:7
before 7.14-2+deb7u17, plus listed versions
7.14-27.14-2+deb7u17.14-2+deb7u107.14-2+deb7u10~bpo60+17.14-2+deb7u11
Show 20 moreShow less
7.14-2+deb7u11~bpo60+17.14-2+deb7u127.14-2+deb7u137.14-2+deb7u147.14-2+deb7u157.14-2+deb7u167.14-2+deb7u1~bpo60+17.14-2+deb7u27.14-2+deb7u2~bpo60+17.14-2+deb7u37.14-2+deb7u47.14-2+deb7u4~bpo60+17.14-2+deb7u57.14-2+deb7u67.14-2+deb7u6~bpo60+17.14-2+deb7u77.14-2+deb7u7~bpo60+17.14-2+deb7u87.14-2+deb7u97.14-2+deb7u9~bpo60+1
7.14-2+deb7u17
drupal7
Debian:8
before 7.32-1+deb8u10, plus listed versions
7.32-1+deb8u37.32-1+deb8u47.32-1+deb8u4~bpo70+17.32-1+deb8u57.32-1+deb8u5~bpo70+1
Show 4 moreShow less
7.32-1+deb8u67.32-1+deb8u77.32-1+deb8u87.32-1+deb8u9
7.32-1+deb8u10
drupal7
Debian:9
before 7.52-2+deb9u2, plus listed versions
7.52-27.52-2+deb9u1
7.52-2+deb9u2
drupal7
Ubuntu:Pro:14.04:LTS
All versions, plus listed versions
7.23-17.24-17.24-27.26-17.26-1ubuntu0.17.26-1ubuntu0.1+esm17.26-1ubuntu0.1+esm27.26-1ubuntu0.1+esm3
None known
drupal7
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
7.38-17.41-17.44-1ubuntu1~16.04.07.44-1ubuntu1~16.04.0+esm17.44-1ubuntu1~16.04.0+esm27.44-1ubuntu1~16.04.0+esm3
None known

History

History
WhenChangedSources
2026-11-03aliases, productsEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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