CVE-2021-47977

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-16. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

WordPress Plugin Anti-Malware Security and Bruteforce Firewall 4.20.59 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating the file parameter. Attackers can send requests to the duplicator_download action via admin-ajax.php with path traversal sequences to access sensitive system files outside the intended directory.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

May 16, 2026

Last Modified

July 28, 2026

Advisory Details (4)

Auto-updated May 16, 2026
🔬 Proof of concept available. Patch available.
generic

WordPress Anti-Malware Security Bruteforce Firewall 4.20.59 Directory Traversal | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wordpress-anti-malware-security-bruteforce-firewall-directory-traversal
generic🟡 PoC Available

WordPress Plugin Anti-Malware Security and Bruteforce Firewall 4.20.59 - Directory Traversal - PHP webapps Exploit

https://www.exploit-db.com/exploits/50107
generic Patch Available

Downloads – Download this free Anti-Malware Plugin for WordPress.

https://gotmls.net/downloads/
generic

Download this free Anti-Malware Plugin for WordPress.

https://gotmls.net/

Vendor Advisories for CVE-2021-47977(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 44× 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 183 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47977?
CVE-2021-47977 is a high vulnerability published on May 16, 2026. WordPress Plugin Anti-Malware Security and Bruteforce Firewall 4.20.59 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating the file parameter. Attackers can send requests to the duplicator_download action via admin-ajax.php with…
When was CVE-2021-47977 disclosed?
CVE-2021-47977 was first published in the National Vulnerability Database on May 16, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47977 actively exploited?
CVE-2021-47977 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.4% of all scored CVEs.
What is the CVSS score of CVE-2021-47977?
CVE-2021-47977 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2021-47977?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47977, 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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