CVE-2026-65884

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 84% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 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.

Joomla Extension - balbooa.com - Privilege Escalation in Gridbox < 2.20.2 - The registration method allows users provided usergroup IDs, allowing unauthenticated actors to register new accounts with administrative permissions.

CVSS v3
10.0
EG Score
10.0(medium)
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
16%
KEV
Not listed

Published

July 29, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Jul 30, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Build a Joomla Site — Joomla Website Builder Gridbox

https://www.balbooa.com/gridbox
generic🔴 Active Exploitation

Gridbox: 23 More Critical Vulnerabilities | mySites.guru

https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/

Vendor Advisories for CVE-2026-65884(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 28× in last 7d / 28× 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. 2026-07-31 21:54 UTCGHSA enrichment
  2. 2026-07-31 18:02 UTCGHSA enrichment
  3. 2026-07-31 14:09 UTCGHSA enrichment
  4. 2026-07-31 10:17 UTCGHSA enrichment
  5. 2026-07-31 06:24 UTCGHSA enrichment
  6. 2026-07-31 02:30 UTCGHSA enrichment
  7. 2026-07-30 22:36 UTCGHSA enrichment
  8. 2026-07-30 18:45 UTCEG score recompute
  9. 2026-07-30 18:45 UTCGHSA enrichment
  10. 2026-07-30 16:28 UTCEPSS rescore
  11. 2026-07-30 14:08 UTCEG score recompute
  12. 2026-07-30 14:08 UTCGHSA enrichment
  13. 2026-07-30 10:38 UTCEG score recompute
  14. 2026-07-30 10:37 UTCGHSA enrichment
  15. 2026-07-30 06:39 UTCEG score recompute
  16. 2026-07-30 06:39 UTCGHSA enrichment
  17. 2026-07-30 05:21 UTCEG score recompute
  18. 2026-07-30 05:21 UTCGHSA enrichment
  19. 2026-07-30 04:23 UTCEG score recompute
  20. 2026-07-30 04:23 UTCGHSA enrichment
  21. 2026-07-30 03:03 UTCGHSA enrichment
  22. 2026-07-29 23:11 UTCGHSA enrichment
  23. 2026-07-29 19:18 UTCGHSA enrichment
  24. 2026-07-29 15:23 UTCEG score recompute
  25. 2026-07-29 14:48 UTCEG score recompute
Show 3 more
  1. 2026-07-29 13:38 UTCEG score recompute
  2. 2026-07-29 12:38 UTCEG score recompute
  3. 2026-07-29 12:37 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-65884?
CVE-2026-65884 is a critical vulnerability published on July 29, 2026. Joomla Extension - balbooa.com - Privilege Escalation in Gridbox < 2.20.2 - The registration method allows users provided usergroup IDs, allowing unauthenticated actors to register new accounts with administrative permissions.
When was CVE-2026-65884 disclosed?
CVE-2026-65884 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65884 actively exploited?
CVE-2026-65884 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 83.7% of all scored CVEs.
What is the CVSS score of CVE-2026-65884?
CVE-2026-65884 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-65884?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65884, 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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