CVE-2021-24946

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 72.8%, top 1% 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
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 73%
  • Public exploit code is available (Metasploit, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 73%CVSS: 9.8Exploit: Metasploit · epss top5pct · epss high · public exploitExposed: 0

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

The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the time parameter before using it in a SQL statement in the mec_load_single_page AJAX action, available to unauthenticated users, leading to an unauthenticated SQL injection issue

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
78(Track*)
EG Risk 78/100SSVC: 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
Severity98% × 45%
Exploitation73% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
73%
EPSS %ILE
99%
KEV
Not listed

Published

December 13, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Sep 5, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Modern Events Calendar < 6.1.5 – Unauthenticated Blind SQL Injection | CVE 2021-24946 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/09871847-1d6a-4dfe-8a8c-f2f53ff87445
generic

Exploits/Wordpress/CVE-2021-24946 at main · Hacker5preme/Exploits · GitHub

https://github.com/Hacker5preme/Exploits/tree/main/Wordpress/CVE-2021-24946

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 20× 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.

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

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-50687
    First seen Jan 27, 2022

    WordPress Plugin Modern Events Calendar V 6.1 - SQL Injection (Unauthenticated)

    Open source ↗
  • Metasploitauxiliary/scanner/http/wp_modern_events_calendar_sqli✓ verified
    First seen Dec 13, 2021

    WordPress Modern Events Calendar SQLi Scanner

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-24946.yaml
    First seen Jan 1, 2021

    WordPress Modern Events Calendar <6.1.5 - Blind SQL Injection

    Open source ↗

Frequently asked(5)

What is CVE-2021-24946?
CVE-2021-24946 is a critical vulnerability published on December 13, 2021. The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the time parameter before using it in a SQL statement in the mecloadsingle_page AJAX action, available to unauthenticated users, leading to an unauthenticated SQL injection issue
When was CVE-2021-24946 disclosed?
CVE-2021-24946 was first published in the National Vulnerability Database on December 13, 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-2021-24946 actively exploited?
CVE-2021-24946 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 73% probability of exploitation in the next 30 days, which ranks it in the top 0.6% of all scored CVEs.
What is the CVSS score of CVE-2021-24946?
CVE-2021-24946 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-24946?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-24946, 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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