File REST resource does not properly validate
Published Jan 15, 2019
5.9
MEDIUMCVSS 3.0
EPSS 1.83%
Description
In Drupal 8 prior to 8.3.4; The file REST resource does not properly validate some fields when manipulating files. A site is only affected by this if the site has the RESTful Web Services (rest) module enabled, the file REST resource is enabled and allows PATCH requests, and an attacker can get or register a user account on the site with permissions to upload files and to modify the file resource.
Affected products
-
- Version Drupal 8StatusaffectedConstraints<8.3.4
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Drupal | Drupal Core | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.83% (0.01834) | 78.16th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.83% (0.01834) | 77.95th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.73% (0.00734) | 81.01th | v3 (v2023.03.01) |
| Jul 17, 2024 | 0.73% (0.00734) | 81.00th | v3 (v2023.03.01) |
| Jun 7, 2024 | 0.63% (0.00633) | 79.09th | v3 (v2023.03.01) |
| Feb 13, 2024 | 0.91% (0.00913) | 82.31th | v3 (v2023.03.01) |
| Jan 9, 2024 | 0.91% (0.00905) | 80.98th | v3 (v2023.03.01) |
| Nov 21, 2023 | 1.18% (0.01179) | 83.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.25% (0.01253) | 83.41th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.88% (0.00884) | 25.39th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.88% (0.00884) | 0.00th | v1 |
References (8)
- http://www.securityfocus.com/bid/99222 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038781 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6921.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6921.yaml
- https://github.com/advisories/GHSA-h377-287m-w2r9 Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-6921
- https://www.drupal.org/SA-CORE-2017-003
- https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple x_refsource_CONFIRMMitigationVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/99222 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1038781 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6921.yaml | ||
| https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6921.yaml | ||
| https://github.com/advisories/GHSA-h377-287m-w2r9 | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-6921 | ||
| https://www.drupal.org/SA-CORE-2017-003 | ||
| https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple | x_refsource_CONFIRMMitigationVendor Advisory |
Change history (0)
No recorded changes yet.