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Known exploited vulnerability

CVE-2020-13671

highCVSS 3.1 8.8In CISA KEVEPSS 36%Published · Drupal

The short answer

CVE-2020-13671 affects Drupal Drupal Core and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-01-18: attackers are using it, so patch it first. Fixed versions are published for drupal/core (9.0.8, 8.9.9, 8.8.11) and drupal/drupal (7.74, 8.8.11, 8.9.9).

What it is

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.

Weakness: CWE-434.

Severity

8.8 high

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

Exploited (CISA KEV)

Yes, since Jan 18, 2022

Federal due date Jul 18, 2022

EPSS, next 30 days

36%

Higher than 98% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected packages and fixed versions

PackageEcosystemFixed inAdvisory
drupal/corePackagist9.0.8, 8.9.9, 8.8.11, 7.74GHSA-68jc-v27h-vhmw
drupal/drupalPackagist7.74, 8.8.11, 8.9.9, 9.0.8GHSA-68jc-v27h-vhmw

Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.

Affected products

Drupal Core. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2020-13671 being exploited?

Yes. CISA added CVE-2020-13671 to its Known Exploited Vulnerabilities catalog on 2022-01-18, with a federal remediation due date of 2022-07-18.

How do I fix CVE-2020-13671?

Upgrade to a fixed version: drupal/core (Packagist) 9.0.8 or 8.9.9 or 8.8.11 or 7.74; drupal/drupal (Packagist) 7.74 or 8.8.11 or 8.9.9 or 9.0.8. CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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