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)
EPSS
36.3%
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 / 77× 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 189 total refreshes for this CVE.

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

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 36.3% 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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