CVE-2021-47959

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-15. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

WordPress Plugin WPGraphQL 1.3.5 contains a denial of service vulnerability that allows unauthenticated attackers to exhaust server resources by sending batched GraphQL queries with duplicated fields. Attackers can send POST requests to the GraphQL endpoint with amplified field duplication payloads to trigger server out-of-memory conditions and MySQL connection errors.

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
36.7%
KEV
Not listed

Published

May 15, 2026

Last Modified

May 18, 2026

Advisory Details (3)

Auto-updated May 18, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic
https://www.wpgraphql.com/
generic

WordPress Plugin WPGraphQL 1.3.5 Denial of Service | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wordpress-plugin-wpgraphql-denial-of-service
generic🟡 PoC Available

WordPress Plugin WPGraphQL 1.3.5 - Denial of Service - PHP dos Exploit

https://www.exploit-db.com/exploits/49807

Vendor Advisories for CVE-2021-47959(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 11× in last 7d / 53× 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 170 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47959?
CVE-2021-47959 is a high vulnerability published on May 15, 2026. WordPress Plugin WPGraphQL 1.3.5 contains a denial of service vulnerability that allows unauthenticated attackers to exhaust server resources by sending batched GraphQL queries with duplicated fields. Attackers can send POST requests to the GraphQL endpoint with amplified field duplication payloads…
When was CVE-2021-47959 disclosed?
CVE-2021-47959 was first published in the National Vulnerability Database on May 15, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47959 actively exploited?
CVE-2021-47959 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 36.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-47959?
CVE-2021-47959 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2021-47959?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47959, 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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