Security readout for executives and security teams
Plain-English summary
A logged-in WordPress user could abuse Brizy Page Builder up to version 2.3.11 to write files into chosen locations. On some server configurations, this could allow attacker-controlled code to run and lead to site takeover.
Executive priority
Treat as high priority for internet-facing WordPress sites using Brizy. The business risk is website takeover from a low-privilege account, but urgency depends on whether the plugin is present and exposed.
Technical view
The brizy_create_block_screenshot AJAX action accepted attacker-controlled filename and file content inputs. The id parameter allowed ../ path traversal, and ibsf content was base64-decoded and written with a .jpg suffix. Double extensions could remain executable on some common configurations.
Likely exposure
Exposure is likely limited to WordPress sites running Brizy Page Builder version 2.3.11 or earlier with attacker-accessible authenticated accounts. Risk increases where web servers execute double-extension files.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires authenticated access, but CVSS rates privileges required as low and no user interaction as needed.
Researcher notes
The CVE metadata lists CWE-79, but the described behavior is unrestricted file upload plus path traversal. Evidence for a named fixed version is not included in the supplied bundle, so remediation should follow current vendor guidance.
Mitigation direction
- Identify all WordPress sites using Brizy Page Builder.
- Update Brizy beyond affected versions using vendor guidance.
- Restrict or remove unnecessary WordPress user accounts.
- Review server handling of double-extension uploads.
- Check webroot and upload paths for unexpected files.
Validation and detection
- Confirm installed Brizy Page Builder version on each WordPress site.
- Review WordPress users with low-privilege authenticated access.
- Inspect logs for brizy_create_block_screenshot AJAX activity.
- Look for suspicious .php.jpg files in writable web paths.
- Verify web server does not execute uploaded double-extension files.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-38346 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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.
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:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/blog/2021/10/multiple-vulnerabilities-in-brizy-page-builder-plugin-allow-site-takeover/CVE reference · x_refsource_MISC
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.