Security readout for executives and security teams
Plain-English summary
Older Brizy Page Builder versions for WordPress allowed a logged-in low-privileged user to store JavaScript in page content. That script could run for visitors or administrators viewing or previewing the affected page, creating risk of data theft, session abuse, and site-content manipulation.
Executive priority
Treat this as a moderate-priority web risk. Patch or validate affected WordPress sites promptly, with higher urgency for customer-facing sites, public registration, or shared contributor environments.
Technical view
CVE-2021-38344 is a stored XSS issue in Brizy Page Builder <= 2.3.11. The source describes abuse of the brizy_update_item AJAX update path, where attacker-controlled JavaScript could be placed in the data parameter and later execute when the page or post was viewed or previewed.
Likely exposure
Exposure is most likely on WordPress sites using Brizy Page Builder version 2.3.11 or earlier, especially where subscribers or other low-privileged accounts exist or user registration is enabled.
Exploitation context
The CVE requires authenticated low-privileged access and no user interaction by the attacker after storage. The bundle does not cite CISA KEV listing or active exploitation evidence, so active exploitation should not be assumed.
Researcher notes
Evidence supports stored XSS with low-privileged authentication in Brizy <= 2.3.11. The bundle does not provide a specific fixed version, exploit-in-the-wild confirmation, or official mitigation beyond the vulnerable version boundary.
Mitigation direction
- Identify all WordPress sites running Brizy Page Builder.
- Check Brizy vendor guidance for the fixed release and update accordingly.
- Prioritize sites with public registration or many low-privileged users.
- Remove or disable unnecessary subscriber-level accounts.
- Review affected pages before restoring normal publishing workflows.
Validation and detection
- Verify Brizy Page Builder is not version 2.3.11 or earlier.
- Inventory WordPress accounts with subscriber or similar low privileges.
- Review recent Brizy page updates for unexpected script content.
- Confirm patched sites reject stored script insertion in staging.
- Check visitor-facing and preview pages for unexpected JavaScript execution.
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 lookupCVE-2021-38344 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.