Security readout for executives and security teams
Plain-English summary
This is a medium-severity access control flaw in the WordPress Fusion Builder, also referenced as Avada Builder. An authenticated user may be able to perform actions they should not be authorized to perform, with limited integrity and availability impact. It matters most on sites with many contributor, customer, or other low-privilege accounts.
Executive priority
Prioritize remediation in the normal WordPress security maintenance cycle, faster for externally exposed sites with many authenticated users. This is not currently evidenced as actively exploited, but broken access control can affect content integrity and site operations.
Technical view
CVE-2023-39310 is a CWE-862 missing authorization issue affecting ThemeFusion Fusion Builder through version 3.11.1. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L, indicating remote authenticated exploitation with low complexity, no user interaction, and limited integrity and availability impact.
Likely exposure
Exposure is likely limited to WordPress sites running ThemeFusion Fusion Builder or Avada Builder through 3.11.1. Sites allowing broad user registration, contributor access, customer accounts, or shared administrator workflows face higher practical risk.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The CVSS vector indicates exploitation requires a logged-in user and does not require user interaction. No endpoint, proof-of-concept detail, or exploit maturity evidence is provided.
Researcher notes
Evidence is sufficient to identify class, affected component, version ceiling, and CVSS characteristics. It is incomplete on exact vulnerable actions, fixed version, and exploitation status. Do not infer confidentiality impact; the CVSS vector lists none.
Mitigation direction
- Inventory WordPress sites using Fusion Builder or Avada Builder.
- Confirm whether installed versions are 3.11.1 or earlier.
- Check ThemeFusion and Patchstack guidance for a vendor-confirmed fixed release.
- Apply the vendor-confirmed update in staging before production rollout.
- Restrict unnecessary WordPress accounts and roles until remediation is complete.
Validation and detection
- Verify plugin name and version from WordPress administration or asset inventory.
- Review whether public registration or low-privilege user access is enabled.
- Check logs for unusual authenticated actions involving builder functionality.
- Confirm the deployed version matches vendor remediation guidance.
- Document compensating controls if immediate update is not possible.
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-862: 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-2023-39310 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
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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.
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:L/UI:N/S:U/C:N/I:L/A:L2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source materials
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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.