Security readout for executives and security teams
Plain-English summary
This is a stored cross-site scripting issue in the WordPress WPBakery Page Builder plugin. A user with at least contributor-level access could save content that later runs script in another user's browser. That can affect confidentiality, integrity, and availability at a limited level.
Executive priority
Treat this as a moderate website risk. It is not listed as actively exploited in the provided sources, but sites with many content contributors should prioritize verification and plugin update review.
Technical view
CVE-2023-31213 is a CWE-79 stored XSS vulnerability in WPBakery Page Builder, package js_composer. The CVSS 3.1 score is 6.5 with low attack complexity, low privileges required, user interaction required, and changed scope. Version evidence in the bundle is inconsistent around <6.13.0 versus <=6.13.0.
Likely exposure
Exposure is mainly WordPress sites running WPBakery Page Builder where untrusted or lower-privileged users can create or edit content, especially contributor-level accounts or compromised authoring accounts.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Successful abuse requires authenticated contributor-or-higher access and a victim interaction path where stored content is viewed in a browser.
Researcher notes
The core ambiguity is affected-version wording: the title says versions before 6.13.0, while the description says versions up to and including 6.13.0. Do not assume the fixed version without vendor confirmation.
Mitigation direction
- Inventory WordPress sites using WPBakery Page Builder.
- Check installed WPBakery versions against official vendor and Patchstack guidance.
- Update the plugin if vendor guidance identifies a fixed release.
- Restrict contributor and author access to trusted accounts only.
- Review recently changed pages or posts from lower-privileged users.
Validation and detection
- Confirm whether WPBakery Page Builder is installed and active.
- Record the exact plugin version for each WordPress site.
- Review user roles with contributor, author, editor, or administrator access.
- Check logs and content history for suspicious edits by low-privilege users.
- Verify remediation against vendor or Patchstack version 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-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-2023-31213 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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.
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.