CVE-2020-13671

HIGHNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-01-18), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Trending — 4 sources updated this weekExploited in the wild
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 4%CVSS: 8.8Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
8.8
EG Score
9.0(high)
EPSS
90.1%
KEV
⚠ Exploited

Published

November 20, 2020

Last Modified

November 3, 2025

Advisory Details (4)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13671
generic

Drupal core - Critical - Remote code execution - SA-CORE-2020-012 | Drupal.org

https://www.drupal.org/sa-core-2020-012
generic

[SECURITY] Fedora 33 Update: drupal8-8.9.11-1.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/
generic

[SECURITY] Fedora 32 Update: drupal8-8.9.11-1.fc32 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudrupal7 (7.44-1ubuntu1~16.04.0+esm2) @ xenial2026-07-22ubuntu
ubuntudrupal7 (7.26-1ubuntu0.1+esm2) @ trusty2026-07-22ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 1 ecosystem)
Packagist(2)
PackageVulnerable rangeFixed inDependents
drupal/core—7.74—
drupal/drupal9.0.0 ... 9.0.7 (8 versions)9.0.8—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 45× in last 7d / 187× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 351 total refreshes for this CVE.

  1. 2026-07-22 21:44 UTCEG score recompute
  2. 2026-07-22 21:44 UTCVendor advisory
  3. 2026-07-22 19:40 UTCCISA KEV update
  4. 2026-07-22 17:21 UTCEG score recompute
  5. 2026-07-22 14:05 UTCEPSS rescore
  6. 2026-07-21 20:26 UTCVendor advisory
  7. 2026-07-21 16:14 UTCEG score recompute
  8. 2026-07-21 15:22 UTCEPSS rescore
  9. 2026-07-21 15:22 UTCEPSS rescore
  10. 2026-07-21 14:37 UTCCISA KEV update
  11. 2026-07-21 03:42 UTCVendor advisory
  12. 2026-07-20 23:31 UTCVendor advisory
  13. 2026-07-20 19:21 UTCEG score recompute
  14. 2026-07-20 19:21 UTCVendor advisory
  15. 2026-07-20 17:04 UTCEPSS rescore
  16. 2026-07-20 10:58 UTCVendor advisory
  17. 2026-07-20 06:47 UTCVendor advisory
  18. 2026-07-20 02:32 UTCVendor advisory
  19. 2026-07-19 22:20 UTCVendor advisory
  20. 2026-07-19 18:09 UTCEG score recompute
  21. 2026-07-19 18:09 UTCVendor advisory
  22. 2026-07-19 14:28 UTCEPSS rescore
  23. 2026-07-19 14:28 UTCEPSS rescore
  24. 2026-07-19 13:58 UTCVendor advisory
  25. 2026-07-19 09:48 UTCVendor advisory
Show 75 more
  1. 2026-07-19 05:38 UTCEG score recompute
  2. 2026-07-19 05:38 UTCVendor advisory
  3. 2026-07-19 02:26 UTCEPSS rescore
  4. 2026-07-19 02:26 UTCEPSS rescore
  5. 2026-07-19 01:27 UTCVendor advisory
  6. 2026-07-18 17:05 UTCVendor advisory
  7. 2026-07-18 12:55 UTCEG score recompute
  8. 2026-07-18 12:55 UTCVendor advisory
  9. 2026-07-18 10:02 UTCEPSS rescore
  10. 2026-07-18 08:45 UTCVendor advisory
  11. 2026-07-18 04:34 UTCVendor advisory
  12. 2026-07-18 00:24 UTCVendor advisory
  13. 2026-07-17 20:13 UTCVendor advisory
  14. 2026-07-17 07:41 UTCEG score recompute
  15. 2026-07-16 23:21 UTCVendor advisory
  16. 2026-07-16 17:04 UTCCISA KEV update
  17. 2026-07-16 16:59 UTCEPSS rescore
  18. 2026-07-16 16:59 UTCEPSS rescore
  19. 2026-07-16 10:50 UTCVendor advisory
  20. 2026-07-16 02:28 UTCVendor advisory
  21. 2026-07-15 22:18 UTCVendor advisory
  22. 2026-07-15 16:55 UTCEPSS rescore
  23. 2026-07-15 16:49 UTCCISA KEV update
  24. 2026-07-15 15:04 UTCCISA KEV update
  25. 2026-07-15 13:57 UTCVendor advisory
  26. 2026-07-15 05:33 UTCVendor advisory
  27. 2026-07-15 01:22 UTCVendor advisory
  28. 2026-07-14 21:11 UTCVendor advisory
  29. 2026-07-14 18:05 UTCCISA KEV update
  30. 2026-07-14 04:31 UTCVendor advisory
  31. 2026-07-14 00:21 UTCVendor advisory
  32. 2026-07-13 22:27 UTCEPSS rescore
  33. 2026-07-13 20:11 UTCVendor advisory
  34. 2026-07-13 17:07 UTCCISA KEV update
  35. 2026-07-13 16:01 UTCVendor advisory
  36. 2026-07-13 11:50 UTCVendor advisory
  37. 2026-07-13 07:39 UTCVendor advisory
  38. 2026-07-13 06:10 UTCEPSS rescore
  39. 2026-07-13 06:10 UTCEPSS rescore
  40. 2026-07-13 03:28 UTCVendor advisory
  41. 2026-07-12 23:18 UTCVendor advisory
  42. 2026-07-12 19:07 UTCVendor advisory
  43. 2026-07-12 14:56 UTCVendor advisory
  44. 2026-07-12 10:45 UTCVendor advisory
  45. 2026-07-12 06:35 UTCVendor advisory
  46. 2026-07-12 05:44 UTCEPSS rescore
  47. 2026-07-12 02:24 UTCVendor advisory
  48. 2026-07-11 22:14 UTCVendor advisory
  49. 2026-07-11 18:04 UTCVendor advisory
  50. 2026-07-11 13:54 UTCVendor advisory
  51. 2026-07-11 09:44 UTCVendor advisory
  52. 2026-07-11 08:24 UTCEPSS rescore
  53. 2026-07-11 05:34 UTCVendor advisory
  54. 2026-07-11 01:23 UTCVendor advisory
  55. 2026-07-10 21:13 UTCVendor advisory
  56. 2026-07-10 17:52 UTCCISA KEV update
  57. 2026-07-10 17:03 UTCVendor advisory
  58. 2026-07-10 08:42 UTCVendor advisory
  59. 2026-07-10 04:32 UTCVendor advisory
  60. 2026-07-09 20:09 UTCVendor advisory
  61. 2026-07-09 19:06 UTCEPSS rescore
  62. 2026-07-09 03:24 UTCVendor advisory
  63. 2026-07-08 23:14 UTCVendor advisory
  64. 2026-07-08 15:11 UTCEPSS rescore
  65. 2026-07-08 10:41 UTCVendor advisory
  66. 2026-07-08 02:19 UTCVendor advisory
  67. 2026-07-07 22:10 UTCVendor advisory
  68. 2026-07-07 19:01 UTCCISA KEV update
  69. 2026-07-07 17:59 UTCVendor advisory
  70. 2026-07-07 17:16 UTCCISA KEV update
  71. 2026-07-07 13:49 UTCVendor advisory
  72. 2026-07-07 13:43 UTCEPSS rescore
  73. 2026-07-07 09:37 UTCVendor advisory
  74. 2026-07-07 05:27 UTCVendor advisory
  75. 2026-07-07 01:17 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2020-13671?
CVE-2020-13671 is a high vulnerability published on November 20, 2020. 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…
When was CVE-2020-13671 disclosed?
CVE-2020-13671 was first published in the National Vulnerability Database on November 20, 2020, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-13671 actively exploited?
Yes. CISA added CVE-2020-13671 to the Known Exploited Vulnerabilities catalog on January 18, 2022, affecting Drupal Drupal core. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-13671?
CVE-2020-13671 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2020-13671?
CVE-2020-13671 affects Drupal Drupal core. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-13671?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-13671, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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