CVE-2020-13671
Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect…
- Published
- Updated
- Reserved
- Assigned by
- drupal
Description
Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Drupal core Un-restricted Upload of File.
- Added
- 18 Jan 2022
- Fix due (US federal)
- 18 Jul 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.
Timeline
ID reserved
By drupal
- 6 months later
· 6 months later
Published
- 14 months later
· 14 months later
Added to CISA KEV
Known exploited in the wild
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 36.2% · top 1.5% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
- affected 9.0 versions prior to 9.0.8
- affected 8.9 versions prior to 8.9.9
- affected 8.8 versions prior to 8.8.11
- affected 7 versions prior to 7.74
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistdrupal/coreGHSA-68jc-v27h-vhmw (opens in a new tab)
- Packagistdrupal/drupalGHSA-68jc-v27h-vhmw (opens in a new tab)
References (4)
- https://www.drupal.org/sa-core-2020-012 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2020-6f1079934c (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2020-d50d74d6f2 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13671 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-68jc-v27h-vhmw (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-13671)Record last updated .