Security readout for executives and security teams
Plain-English summary
Sourcerer for Joomla versions 1.0.0 through 12.2.8 can execute content that should have been blocked by ownership, permission, include-folder, or script-detection controls. Successful abuse could expose data, alter the website, or disrupt service. The supplied sources do not identify a corrected release.
Executive priority
Treat confirmed affected installations as an immediate remediation priority because successful abuse may compromise confidentiality, integrity, and availability. Establish ownership today, identify internet-facing deployments first, and obtain vendor remediation guidance. Escalate any evidence of unexpected content execution or file access to incident response.
Technical view
Free edition inadequately checked both article owners before executing PHP. Pro inconsistently enforced PHP, CSS, and JavaScript permissions across multiple input forms. Include attributes could escape the configured folder, while executable script or style variants could evade detection. The record classifies this as improper authorization and scores it CVSS 3.1 9.8.
Likely exposure
Exposure requires a Joomla deployment using Sourcerer version 1.0.0 through 12.2.8. Both Free and Pro editions have described weaknesses, although their vulnerable behaviors differ. Systems without the extension or outside the listed versions are not identified as affected.
Exploitation context
The CVSS vector describes network-reachable, low-complexity exploitation without privileges or user interaction. However, the supplied bundle does not explain the complete attack prerequisites. CVE-2026-64796 is not listed as KEV, and no supplied source confirms active exploitation or public exploit availability.
Researcher notes
The supplied record describes several authorization and filtering failures but provides no detailed affected configuration matrix, corrected version, vendor advisory, or exploitation evidence. Defensive validation should focus on version identification, edition-specific exposure, permission configuration, include boundaries, suspicious content, and execution telemetry without attempting weaponized testing.
Mitigation direction
- Inventory Joomla sites and identify every installed Sourcerer edition and version.
- Check Regular Labs guidance for a corrected release or official mitigation.
- Prioritize restricting public access to affected sites until vendor guidance is available.
- Limit article editing and extension administration to trusted accounts as an interim risk reduction.
- Review Sourcerer permission and include-folder configurations; do not treat configuration alone as a complete fix.
Validation and detection
- Confirm whether Sourcerer version 1.0.0 through 12.2.8 is installed.
- Record whether each deployment uses the Free or Pro edition.
- Review articles for unexpected PHP, include attributes, scripts, styles, or recent ownership changes.
- Inspect application and system logs for unexplained file access, code execution, or content modification.
- After remediation, verify the installed version against current Regular Labs guidance.
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2026-64796 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
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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://regularlabs.com/CVE reference, Joomla · product
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 Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.