CVE-2020-13671

CRITICALNVD 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 4%CVSS: 8.8Exploit: cisa kev · ssvc activeExposed: 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)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
4%
EPSS %ILE
90%
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) @ xenial2026-07-26ubuntu
ubuntudrupal7 (7.26-1ubuntu0.1+esm2) @ trusty2026-07-26ubuntu

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 26× in last 7d / 172× 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 362 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2020-13671?
CVE-2020-13671 is a critical 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.

Dependency Blast Radius

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