CVE-2026-84021

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreHIGH confidence

Score 6.8 from GitHub Security Advisory published 2026-09-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0

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

The Bold Page Builder WordPress plugin before 5.9.8 does not properly validate a link URL before outputting it in an HTML attribute, relying on a filter that can be evaded, allowing users with the Contributor role and above to inject arbitrary web scripts that execute when a user clicks the affected link.

CVSS v3
6.8
EG Score
6.8(high)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 6, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Bold Page Builder < 5.9.8 – Contributor+ Stored XSS via bt_bb_button/bt_bb_headline/bt_bb_icon URL | CVE 2026-84021 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/ca226eab-59a2-42d5-96f6-84dacf7c6c5a/

Vendor Advisories for CVE-2026-84021(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 20× in last 7d / 61× 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. 2026-09-24 18:23 UTCEG score recompute
  2. 2026-09-24 18:23 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 19:45 UTCEG score recompute
  5. 2026-09-23 19:45 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-22 20:04 UTCEG score recompute
  8. 2026-09-22 20:04 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-21 21:40 UTCEG score recompute
  11. 2026-09-21 21:40 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 23:17 UTCEG score recompute
  14. 2026-09-20 23:17 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 00:47 UTCEG score recompute
  17. 2026-09-20 00:47 UTCGHSA enrichment
  18. 2026-09-19 02:22 UTCEG score recompute
  19. 2026-09-19 02:22 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 03:59 UTCEG score recompute
  22. 2026-09-18 03:59 UTCGHSA enrichment
  23. 2026-09-17 19:32 UTCEPSS rescore
  24. 2026-09-17 05:35 UTCEG score recompute
  25. 2026-09-17 05:35 UTCGHSA enrichment
Show 36 more
  1. 2026-09-16 14:09 UTCEPSS rescore
  2. 2026-09-16 07:11 UTCEG score recompute
  3. 2026-09-16 07:11 UTCGHSA enrichment
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-15 08:46 UTCEG score recompute
  6. 2026-09-15 08:46 UTCGHSA enrichment
  7. 2026-09-15 03:12 UTCEPSS rescore
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-14 10:22 UTCEG score recompute
  10. 2026-09-14 10:22 UTCGHSA enrichment
  11. 2026-09-13 11:58 UTCEG score recompute
  12. 2026-09-13 11:58 UTCGHSA enrichment
  13. 2026-09-12 13:34 UTCGHSA enrichment
  14. 2026-09-11 15:09 UTCEG score recompute
  15. 2026-09-11 15:09 UTCGHSA enrichment
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-10 16:44 UTCEG score recompute
  19. 2026-09-10 16:44 UTCGHSA enrichment
  20. 2026-09-09 18:20 UTCEG score recompute
  21. 2026-09-09 18:19 UTCGHSA enrichment
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-08 19:55 UTCGHSA enrichment
  24. 2026-09-08 08:12 UTCEG score recompute
  25. 2026-09-08 08:12 UTCGHSA enrichment
  26. 2026-09-07 09:48 UTCEG score recompute
  27. 2026-09-07 09:48 UTCGHSA enrichment
  28. 2026-09-06 13:48 UTCEPSS rescore
  29. 2026-09-06 11:22 UTCGHSA enrichment
  30. 2026-09-06 10:45 UTCEG score recompute▲ 6.80
  31. 2026-09-06 10:45 UTCGHSA enrichment
  32. 2026-09-06 10:44 UTCMITRE cvelistV5CVSS v3 → 6.8 · severity → MEDIUM
  33. 2026-09-05 15:31 UTCEPSS rescore
  34. 2026-09-05 07:23 UTCNVD update
  35. 2026-09-05 06:35 UTCEG score recompute
  36. 2026-09-05 06:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84021?
CVE-2026-84021 is a medium vulnerability published on September 5, 2026. The Bold Page Builder WordPress plugin before 5.9.8 does not properly validate a link URL before outputting it in an HTML attribute, relying on a filter that can be evaded, allowing users with the Contributor role and above to inject arbitrary web scripts that execute when a user clicks the…
When was CVE-2026-84021 disclosed?
CVE-2026-84021 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84021 actively exploited?
CVE-2026-84021 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 65.4% of all scored CVEs.
What is the CVSS score of CVE-2026-84021?
CVE-2026-84021 has a CVSS v3.1 base score of 6.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84021, 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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