CVE-2026-15413

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH 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(high)
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 13, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

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 56× in last 7d / 71× 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. 2026-08-21 05:42 UTCGHSA enrichment
  2. 2026-08-21 01:48 UTCEG score recompute
  3. 2026-08-21 01:48 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 21:51 UTCGHSA enrichment
  6. 2026-08-20 17:58 UTCGHSA enrichment
  7. 2026-08-20 14:04 UTCGHSA enrichment
  8. 2026-08-20 10:09 UTCGHSA enrichment
  9. 2026-08-20 06:15 UTCGHSA enrichment
  10. 2026-08-20 02:19 UTCGHSA enrichment
  11. 2026-08-19 22:25 UTCGHSA enrichment
  12. 2026-08-19 18:31 UTCEG score recompute
  13. 2026-08-19 18:31 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 13:15 UTCGHSA enrichment
  16. 2026-08-19 09:21 UTCGHSA enrichment
  17. 2026-08-19 05:26 UTCGHSA enrichment
  18. 2026-08-19 01:32 UTCGHSA enrichment
  19. 2026-08-18 21:38 UTCGHSA enrichment
  20. 2026-08-18 17:15 UTCEG score recompute
  21. 2026-08-18 17:15 UTCGHSA enrichment
  22. 2026-08-18 13:48 UTCEPSS rescore
  23. 2026-08-18 13:09 UTCGHSA enrichment
  24. 2026-08-18 09:14 UTCGHSA enrichment
  25. 2026-08-18 05:19 UTCGHSA enrichment
Show 46 more
  1. 2026-08-18 01:21 UTCGHSA enrichment
  2. 2026-08-17 21:23 UTCGHSA enrichment
  3. 2026-08-17 17:29 UTCEG score recompute
  4. 2026-08-17 17:29 UTCGHSA enrichment
  5. 2026-08-17 13:47 UTCEPSS rescore
  6. 2026-08-17 13:31 UTCGHSA enrichment
  7. 2026-08-17 09:37 UTCGHSA enrichment
  8. 2026-08-17 05:44 UTCGHSA enrichment
  9. 2026-08-17 01:41 UTCGHSA enrichment
  10. 2026-08-16 21:47 UTCGHSA enrichment
  11. 2026-08-16 17:53 UTCEG score recompute
  12. 2026-08-16 17:53 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 13:59 UTCGHSA enrichment
  15. 2026-08-16 10:05 UTCGHSA enrichment
  16. 2026-08-16 06:12 UTCGHSA enrichment
  17. 2026-08-16 02:18 UTCEG score recompute
  18. 2026-08-16 02:18 UTCGHSA enrichment
  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-15 22:25 UTCGHSA enrichment
  21. 2026-08-15 18:31 UTCGHSA enrichment
  22. 2026-08-15 14:37 UTCGHSA enrichment
  23. 2026-08-15 10:43 UTCGHSA enrichment
  24. 2026-08-15 06:49 UTCGHSA enrichment
  25. 2026-08-15 02:29 UTCEG score recompute
  26. 2026-08-15 02:29 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 22:35 UTCGHSA enrichment
  29. 2026-08-14 18:42 UTCGHSA enrichment
  30. 2026-08-14 14:48 UTCGHSA enrichment
  31. 2026-08-14 10:55 UTCGHSA enrichment
  32. 2026-08-14 07:01 UTCGHSA enrichment
  33. 2026-08-14 03:07 UTCGHSA enrichment
  34. 2026-08-13 23:14 UTCEG score recompute
  35. 2026-08-13 23:14 UTCGHSA enrichment
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-13 19:20 UTCGHSA enrichment
  38. 2026-08-13 15:26 UTCEG score recompute
  39. 2026-08-13 15:26 UTCGHSA enrichment
  40. 2026-08-13 15:15 UTCEG score recompute
  41. 2026-08-13 15:15 UTCGHSA enrichment
  42. 2026-08-13 13:20 UTCEG score recompute
  43. 2026-08-13 13:20 UTCGHSA enrichment
  44. 2026-08-13 09:27 UTCEG score recompute
  45. 2026-08-13 08:21 UTCEG score recompute
  46. 2026-08-13 08:21 UTCMITRE cvelistV5first tracked

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. 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 78.4% 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

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