CVE-2021-47979

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-16. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

WordPress Plugin Backup and Restore 1.0.3 contains an arbitrary file deletion vulnerability that allows authenticated attackers to delete files by manipulating parameters in AJAX requests. Attackers can send POST requests to admin-ajax.php with crafted file_name and folder_name parameters to delete arbitrary files from the WordPress installation directory.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

May 16, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated May 16, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

WordPress Plugin Backup and Restore 1.0.3 Arbitrary File Deletion | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wordpress-plugin-backup-and-restore-arbitrary-file-deletion
generic

miniOrange Security Software: IAM, PAM, IGA, MDM, DLP, Data Privacy & AI Security

https://www.miniorange.com/
generic🟡 PoC Available

WordPress Plugin Backup and Restore 1.0.3 - Arbitrary File Deletion - PHP webapps Exploit

https://www.exploit-db.com/exploits/50503
generic

Backup and Restore plugin – WordPress – WordPress plugin | WordPress.org

https://wordpress.org/plugins/backup-and-restore-for-wp/

Vendor Advisories for CVE-2021-47979(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 / 43× 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 173 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47979?
CVE-2021-47979 is a high vulnerability published on May 16, 2026. WordPress Plugin Backup and Restore 1.0.3 contains an arbitrary file deletion vulnerability that allows authenticated attackers to delete files by manipulating parameters in AJAX requests. Attackers can send POST requests to admin-ajax.php with crafted filename and foldername parameters to delete…
When was CVE-2021-47979 disclosed?
CVE-2021-47979 was first published in the National Vulnerability Database on May 16, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47979 actively exploited?
CVE-2021-47979 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 67.6% of all scored CVEs.
What is the CVSS score of CVE-2021-47979?
CVE-2021-47979 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2021-47979?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47979, 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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