CVE-2021-47940

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-10. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

WordPress Plugin Download From Files version 1.48 and earlier contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious files by exploiting the AJAX fileupload action. Attackers can send POST requests to the admin-ajax.php endpoint with the download_from_files_617_fileupload action, manipulating the allowExt parameter to bypass file type restrictions and upload executable files like PHP shells to the web root.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

May 10, 2026

Last Modified

July 25, 2026

Advisory Details (3)

Auto-updated Sep 19, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

WordPress Download From Files 1.48 Arbitrary File Upload | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wordpress-download-from-files-arbitrary-file-upload
generic🟡 PoC Available

Wordpress Plugin Download From Files 1.48 - Arbitrary File Upload - PHP webapps Exploit

https://www.exploit-db.com/exploits/50287
generic

Download from files – WordPress plugin | WordPress.org

https://wordpress.org/plugins/download-from-files/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 27× 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 366 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47940?
CVE-2021-47940 is a critical vulnerability published on May 10, 2026. WordPress Plugin Download From Files version 1.48 and earlier contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious files by exploiting the AJAX fileupload action. Attackers can send POST requests to the admin-ajax.php endpoint with the…
When was CVE-2021-47940 disclosed?
CVE-2021-47940 was first published in the National Vulnerability Database on May 10, 2026, with the most recent update on July 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47940 actively exploited?
CVE-2021-47940 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.4% of all scored CVEs.
What is the CVSS score of CVE-2021-47940?
CVE-2021-47940 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-47940?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47940, 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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