Security readout for executives and security teams
Plain-English summary
Gridbox versions 1.0.0 through 2.20.1 contain multiple SQL injection paths reachable without authentication. An attacker could potentially access sensitive database information and alter or disrupt affected Joomla sites. Internet-facing sites using these versions should be treated as urgent remediation candidates.
Executive priority
Prioritize internet-facing affected sites for immediate upgrade and investigation. The vulnerability requires no account or user interaction and carries substantial confidentiality risk, although active exploitation is not established by the supplied evidence.
Technical view
CVE-2026-65890 is a CWE-89 vulnerability in the balbooa.com Gridbox extension for Joomla. Multiple unauthenticated SQL injection vectors affect versions 1.0.0–2.20.1. The CVSS 4.0 score is 9.2, with network access, low complexity, no privileges, no user interaction, and an additional attack requirement.
Likely exposure
Exposure is likely where an affected Gridbox version is installed on a publicly reachable Joomla site. The bundle provides no CPEs, endpoint details, or configuration prerequisites, so asset inventory and installed-version confirmation are essential.
Exploitation context
The source bundle does not establish active exploitation, and the CVE is not listed as KEV. Public technical details in the bundle are limited; however, unauthenticated network reachability and multiple SQL injection vectors make vulnerable internet-facing installations attractive targets.
Researcher notes
The record identifies multiple vectors but does not name vulnerable endpoints, parameters, queries, prerequisites, or detection indicators. The CVSS vector includes AT:P, so some additional condition exists but is not explained. The 2.20.2 fix boundary follows the supplied CVE title; confirm release details with the vendor.
Mitigation direction
- Upgrade Gridbox to version 2.20.2 or a later vendor-supported release.
- Back up the site and database before upgrading.
- If immediate upgrading is impossible, consult current vendor guidance for supported temporary protections.
- Review affected sites for suspicious database access or unexplained content and account changes.
Validation and detection
- Inventory Joomla sites and confirm whether the com_gridbox extension is installed.
- Record each installed Gridbox version; treat versions 1.0.0 through 2.20.1 as affected.
- Confirm the deployed version is 2.20.2 or later after remediation.
- Review web, application, authentication, and database logs for anomalous unauthenticated activity.
- Verify site functionality and data integrity after upgrading.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-65890 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.2 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H——JoomlaVulnerability scoring details
Base CVSS 4.0 score
9.2CriticalVector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.balbooa.com/gridboxCVE reference, Joomla · product
- https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/CVE reference, Joomla · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.