CVE-2026-15413

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-13. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

The Link Factory WordPress plugin is a backdoor. Distributed as a "homepage sentence publisher", it exposes an operator-controlled REST API under /wp-json/link-factory/v1/ - authenticated by a detached Ed25519 signature verified against a hardcoded operator public key (except for the health check).

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Link Factory – Backdoor | CVE 2026-15413 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/4cad269d-0146-4ca9-a1ae-55f02c8e5433/

Vendor Advisories for CVE-2026-15413(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 50× in last 7d / 212× 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 275 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-15413?
CVE-2026-15413 is a critical vulnerability published on August 13, 2026. The Link Factory WordPress plugin is a backdoor. Distributed as a "homepage sentence publisher", it exposes an operator-controlled REST API under /wp-json/link-factory/v1/ - authenticated by a detached Ed25519 signature verified against a hardcoded operator public key (except for the health check).
When was CVE-2026-15413 disclosed?
CVE-2026-15413 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15413 actively exploited?
CVE-2026-15413 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 78.2% of all scored CVEs.
What is the CVSS score of CVE-2026-15413?
CVE-2026-15413 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-15413?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15413, 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

Explore the affected products and dependency analysis for CVE-2026-15413

Explore →

Is Your Infrastructure Affected by CVE-2026-15413?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs