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CVE-2020-13671

Exploited in the wild. In CISA KEV since 2022‑01‑18. Fixed versions are out.

CVSS 3.18.8HighEPSS percentile98th36% chance in 30 daysCISA KEVListedsince 2022-01-18, due 2022-07-18
Public exploit: 2 sourcesFix4 products2 fixed builds listed below

Published Updated Sources: CVE.org, NVD, GitHub, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Drupal CoreAffected: 9.0 versions prior to 9.0.8Upgrade to: not statedAffected: 8.9 versions prior to 8.9.9Upgrade to: not statedAffected: 8.8 versions prior to 8.8.11Upgrade to: not statedAffected: 7 versions prior to 7.74Upgrade to: not statedStated by: CVE record
  • Packagist drupal/coreAffected: ≥ 9.0.0, < 9.0.8Upgrade to: 9.0.8Stated by: GitHub advisory
  • Packagist drupal/drupalAffected: ≥ 7.0.0, < 7.74Upgrade to: 7.74Stated by: GitHub advisory
  • Сообщество свободного программного обеспечения DrupalAffected: от 9.0 до 9.0.8Upgrade to: not statedStated by: BDU

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS98th
Public exploit
CISA KEV
CISA KEV

Listed as exploited in the wild since 2022-01-18.

US federal agencies must remediate by 2022-07-18.

Apply updates per vendor instructions.
Public exploits

2 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

36% chance of exploitation activity in the next 30 days, which ranks it in the 98th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

The patch came 123 days before any public exploit.

  1. EPSS band change0 → moderateepss band change
  2. OpenVAS check added
  3. Public exploit / PoCsource: github-poc
  4. Patch availablerecord updated
  5. Added to CISA KEV
  6. Publishedweakness classified, att&ck mapped

Affected products

And 1 more affected product. See all after sign-in

Scale

How widely the affected products are used. This is not a count of vulnerable hosts.

Estimate Public sources, each figure dated. How much of it is already patched is not known.

Drupal

Web

Usage: unknown. No public source measures this product yet.

Version split: unknown. No public source for this product.

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 8.8 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 10 more references. See all after sign-in

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next exploited one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Drupal Core, not every advisory. This one: actively exploited.