CVE-2020-13671

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.362 · 98 %ileexploit · PoCDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 3 exploits · PoC

Likely / severe?

36.2% (98th) EPSS

CVSS 6.5 · medium

Is it mine?

32 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

added 2022-01-18remediate by 2022-07-18

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Drupal core Un-restricted Upload of File

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.5–9.9

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.19.9criticalAV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · OSV

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-434USprimaryCWE-434USCWE-74US

exploits (3)

Public proof-of-concept and weaponised exploit code.

Dungsocool/CVE-2020-13671CVE-2020-13671 - Drupal RCE via File Upload Vulnerability Analysis and PoCPoC · poc_in_github
Dungsocool/CVE-2020-13671-oldCVE-2020-13671 - Drupal RCE via File Upload Vulnerability Analysis and PoCPoC · poc_in_github
ivanesk315/CVE-2020-13671ivanesk315/CVE-2020-13671PoC · poc_in_github

affected products (32)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Open Source Drupal< 7.74cert_bundDE
Open Source Drupal< 8.8.11cert_bundDE
Open Source Drupal< 8.9.9cert_bundDE
Open Source Drupal< 9.0.8cert_bundDE
Drupal drupal core≤ 8.8 versions prior to 8.8.11enisa_euvdEU
Drupal drupal core≤ 9.0 versions prior to 9.0.8enisa_euvdEU
Drupal drupal core≤ 8.9 versions prior to 8.9.9enisa_euvdEU
Drupal drupal core≤ 7 versions prior to 7.74enisa_euvdEU
Сообщество свободного программного обеспечения Drupal7 → 7.74fstec_bduRU
Сообщество свободного программного обеспечения Drupal8.8 → 8.8.11fstec_bduRU
Сообщество свободного программного обеспечения Drupal8.9 → 8.9.9fstec_bduRU
Сообщество свободного программного обеспечения Drupal9.0 → 9.0.8fstec_bduRU
drupal drupal7.0 → 7.74nvdUScpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal8.8.0 → 8.8.11nvdUScpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal8.9.0 → 8.9.9nvdUScpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal9.0.0 → 9.0.8nvdUScpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
fedoraproject fedora= 32nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 33nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*

showing 20 of 32

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-1938Drupal: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit den Rechten des DienstesDeutsch2020-11-18csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Drupal ausnutzen, um beliebigen Programmcode mit den Rechten des Dienstes auszuführen.
GHSA-68jc-v27h-vhmwDrupal core Unrestricted Upload of File with Dangerous Type2021-10-12ghsa · osvUS
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.
BIT-drupal-2020-136712024-03-06vendor · osvUS
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.
DRUPAL-CORE-2020-0122020-11-18vendor · osvUS
*Update November 18: Documented longer list of dangerous file extensions* 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.

also known as (7)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund nvd NVD CVE.org MITRE

published 2020-11-20modified 2026-06-17

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+5024 more

references (14)

External citations — patches, advisories, analysis.

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