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CVE-2020-13671

67
FAUCET Score

CVE-2020-13671 is a critical vulnerability in Drupal core affecting versions prior to 9.0.8, 8.9.9, 8.8.11, and 7.74. It stems from improper filename sanitization of uploaded files, allowing them to be misinterpreted and potentially executed as PHP, leading to remote code execution. With a CVSS score of 8.8 (High), this vulnerability is easily exploitable over the network with low privileges, enabling full compromise of confidentiality, integrity, and availability. This flaw is actively exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog, and has garnered significant media attention and community discussion, despite the lack of public exploit code on platforms like Metasploit or ExploitDB.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.0, < 7.74CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
>= 8.8.0, < 8.8.11CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
>= 8.9.0, < 8.9.9CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
>= 9.0.0, < 9.0.8CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.30%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Added to KEV · Jan 18, 2022
This CVE's current EPSS score of 0.0430 is in the 89th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

composerpatch availablevia ghsa
Product: drupal/coreFixed in: 9.0.8
composerpatch availablevia ghsa
Product: drupal/coreFixed in: 8.9.9
composerpatch availablevia ghsa
Product: drupal/coreFixed in: 8.8.11
composerpatch availablevia ghsa
Product: drupal/coreFixed in: 7.74
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 7.74
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 8.8.11
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 8.9.9
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 9.0.8

Vendor Advisories (1)

composerGHSA-68jc-v27h-vhmwhigh

Drupal core Unrestricted Upload of File with Dangerous Type

Oct 12, 2021

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437
Mailing ListRelease Notes
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT
Mailing ListRelease Notes
drupal.org / sa-core-2020-012
Vendor Advisory