CVE-2026-13604

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

The Pixelavo WordPress plugin before 1.5.4 registers an unauthenticated AJAX action, gated only by a nonce that it emits publicly on every front-end page, that forwards client-supplied event data to the configured Facebook Conversions API using the administrator's stored access token. This allows an unauthenticated visitor to inject arbitrary conversion events into the administrator's Facebook ads account and exhaust the configured API quota.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 1, 2026

Last Modified

August 26, 2026

Advisory Details (1)

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

Pixelavo < 1.5.4 – Unauthenticated Facebook CAPI Event Injection via pixelavo_event AJAX | CVE 2026-13604 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/766c961e-e5aa-4ebe-8107-032f46316f91/

Vendor Advisories for CVE-2026-13604(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 17× 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.

Showing the most recent 100 of 128 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13604?
CVE-2026-13604 is a medium vulnerability published on August 1, 2026. The Pixelavo WordPress plugin before 1.5.4 registers an unauthenticated AJAX action, gated only by a nonce that it emits publicly on every front-end page, that forwards client-supplied event data to the configured Facebook Conversions API using the administrator's stored access token. This allows…
When was CVE-2026-13604 disclosed?
CVE-2026-13604 was first published in the National Vulnerability Database on August 1, 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-2026-13604 actively exploited?
CVE-2026-13604 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 93.2% of all scored CVEs.
What is the CVSS score of CVE-2026-13604?
CVE-2026-13604 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-13604?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13604, 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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