CVE-2026-8981

LOWPre-NVD 3.53.5—
EchelonGraph scoreHIGH confidence

Score 3.5 from GitHub Security Advisory (severity: LOW) published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 3.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
3.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 3.5Exploit: NoneExposed: 0

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

The Custom Block Builder WordPress plugin before 4.3.0 does not consistently check the unfiltered_html capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with DISALLOW_UNFILTERED_HTML defined) to inject arbitrary JavaScript that executes for any visitor of pages embedding the affected block.

CVSS v3
3.5
EG Score
3.5(high)
EPSS
3.6%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 9, 2026

References (1)

Vendor Advisories for CVE-2026-8981(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 13× in last 7d / 52× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 02:23 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 02:52 UTCEG score recompute
  5. 2026-07-05 02:52 UTCGHSA enrichment
  6. 2026-07-05 02:31 UTCEPSS rescore
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 06:31 UTCEPSS rescore
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-01 20:21 UTCEG score recompute
  11. 2026-07-01 20:21 UTCGHSA enrichment
  12. 2026-07-01 15:07 UTCEPSS rescore
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-29 14:06 UTCEPSS rescore
  15. 2026-06-28 15:22 UTCEG score recompute
  16. 2026-06-28 15:22 UTCGHSA enrichment
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-27 03:08 UTCEPSS rescore
  20. 2026-06-25 13:50 UTCEPSS rescore
  21. 2026-06-25 10:24 UTCEG score recompute
  22. 2026-06-25 10:24 UTCGHSA enrichment
  23. 2026-06-24 14:05 UTCEPSS rescore
  24. 2026-06-23 21:33 UTCEPSS rescore
  25. 2026-06-22 14:25 UTCEPSS rescore
Show 27 more
  1. 2026-06-22 05:26 UTCEG score recompute
  2. 2026-06-22 05:25 UTCGHSA enrichment
  3. 2026-06-21 14:56 UTCEPSS rescore
  4. 2026-06-21 01:59 UTCEPSS rescore
  5. 2026-06-19 19:26 UTCEPSS rescore
  6. 2026-06-18 21:06 UTCEG score recompute
  7. 2026-06-18 21:06 UTCGHSA enrichment
  8. 2026-06-18 17:52 UTCEPSS rescore
  9. 2026-06-17 17:53 UTCEPSS rescore
  10. 2026-06-16 17:53 UTCEPSS rescore
  11. 2026-06-15 17:49 UTCEPSS rescore
  12. 2026-06-15 17:49 UTCEPSS rescore
  13. 2026-06-15 16:06 UTCEG score recompute
  14. 2026-06-15 16:06 UTCGHSA enrichment
  15. 2026-06-14 23:18 UTCEPSS rescore
  16. 2026-06-13 23:00 UTCEPSS rescore
  17. 2026-06-12 23:12 UTCEPSS rescore
  18. 2026-06-12 23:12 UTCEPSS rescore
  19. 2026-06-12 11:08 UTCEG score recompute▲ 3.50
  20. 2026-06-12 11:08 UTCGHSA enrichment
  21. 2026-06-11 14:00 UTCEPSS rescore
  22. 2026-06-10 22:19 UTCEPSS rescore
  23. 2026-06-10 13:22 UTCEPSS rescore
  24. 2026-06-09 11:19 UTCMITRE cvelistV5CVSS v3 → 3.5 · severity → LOW
  25. 2026-06-09 08:02 UTCNVD update
  26. 2026-06-09 06:11 UTCEG score recompute
  27. 2026-06-09 06:10 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8981?
CVE-2026-8981 is a low vulnerability published on June 9, 2026. The Custom Block Builder WordPress plugin before 4.3.0 does not consistently check the unfilteredhtml capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with DISALLOWUNFILTERED_HTML defined) to inject…
When was CVE-2026-8981 disclosed?
CVE-2026-8981 was first published in the National Vulnerability Database on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8981 actively exploited?
CVE-2026-8981 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8981?
CVE-2026-8981 has a CVSS v3.1 base score of 3.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-8981?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8981, 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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