CVE-2026-12399

MEDIUMPre-NVD 4.44.4—
EchelonGraph scoreHIGH confidence

Score 4.4 from GitHub Security Advisory published 2026-06-27. a secondary CVSS source baseline 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.4Exploit: NoneExposed: 0

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

The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

CVSS v3
4.4
EG Score
4.4(high)
EPSS
15.8%
KEV
Not listed

Published

June 27, 2026

Last Modified

June 29, 2026

References (12)

Vendor Advisories for CVE-2026-12399(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 22× in last 7d / 34× 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. 2026-07-07 03:27 UTCEG score recompute
  2. 2026-07-07 03:27 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 03:51 UTCEG score recompute
  5. 2026-07-06 03:51 UTCGHSA enrichment
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 04:16 UTCEG score recompute
  8. 2026-07-05 04:15 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-04 04:34 UTCEG score recompute
  13. 2026-07-04 04:34 UTCGHSA enrichment
  14. 2026-07-03 04:58 UTCEG score recompute
  15. 2026-07-03 04:58 UTCGHSA enrichment
  16. 2026-07-02 05:21 UTCEG score recompute
  17. 2026-07-02 05:21 UTCGHSA enrichment
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-07-01 05:45 UTCEG score recompute
  21. 2026-07-01 05:45 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 06:07 UTCEG score recompute
  24. 2026-06-30 06:07 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 9 more
  1. 2026-06-29 06:31 UTCEG score recompute
  2. 2026-06-29 06:31 UTCGHSA enrichment
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 06:55 UTCEG score recompute
  5. 2026-06-28 06:54 UTCGHSA enrichment
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 07:19 UTCEG score recompute
  9. 2026-06-27 07:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12399?
CVE-2026-12399 is a medium vulnerability published on June 27, 2026. The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated…
When was CVE-2026-12399 disclosed?
CVE-2026-12399 was first published in the National Vulnerability Database on June 27, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12399 actively exploited?
CVE-2026-12399 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12399?
CVE-2026-12399 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-12399?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12399, 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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