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Exploited vulnerability · CISA KEV

Is CVE-2020-13671 exploited? Yes: in CISA KEV since 18 Jan 2022

Gociux · Drupal core · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-13671, Drupal core Un-restricted Upload of File, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 18 Jan 2022, 424 days after it was published. It affects Drupal core. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 18 Jan 2022
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity8.8CVSS 3.1 · high
US federal due18 Jul 2022BOD 22-01 deadline

What it is

Improper sanitization in the extension file names is present in Drupal core.

VendorDrupal (5 exploited CVEs in KEV)
ProductDrupal core
VulnerabilityDrupal core Un-restricted Upload of File
WeaknessCWE-434
Published20 Nov 2020
Added to KEV18 Jan 2022
Reported by (CNA)drupal

What to do

  1. Check whether you run it. Look for Drupal core in your asset inventory, including appliances and cloud images. Stack check lists every exploited Drupal CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 20 Nov 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for Drupal.

Other exploited CVEs in Drupal core

References

Questions

Is CVE-2020-13671 being exploited?

Yes. CISA added CVE-2020-13671 to the Known Exploited Vulnerabilities catalog on 18 Jan 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-13671 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-13671?

Apply updates per vendor instructions. Check Drupal's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Drupal core and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in January 2022 · Drupal scorecard · act-now radar.

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