CVE-2021-43408

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 9.5%, top 5% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 10%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection. SQL injection vulnerabilities occur when client supplied data is included within an SQL Query insecurely. SQL Injection can typically be exploited to read, modify and delete SQL table data. In many cases it also possible to exploit features of SQL server to execute system commands and/or access the local file system. This particular vulnerability can be exploited by any authenticated user who has been granted access to use the Duplicate Post plugin. By default, this is limited to Administrators, however the plugin presents the option to permit access to the Editor, Author, Contributor and Subscriber roles.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity65% × 45%
Exploitation10% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
10%
EPSS %ILE
95%
KEV
Not listed

Published

November 19, 2021

Last Modified

November 21, 2024

References (4)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 29× 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 133 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2021-43408?
CVE-2021-43408 is a medium vulnerability published on November 19, 2021. The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection. SQL injection vulnerabilities occur when client supplied data is included within an SQL Query insecurely. SQL Injection can typically be exploited to read, modify and delete SQL table data. In…
When was CVE-2021-43408 disclosed?
CVE-2021-43408 was first published in the National Vulnerability Database on November 19, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-43408 actively exploited?
CVE-2021-43408 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10% probability of exploitation in the next 30 days, which ranks it in the top 4.9% of all scored CVEs.
What is the CVSS score of CVE-2021-43408?
CVE-2021-43408 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2021-43408?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43408, 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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