Security readout for executives and security teams
Plain-English summary
This issue affects the TinyMCE Custom Styles WordPress plugin before 1.1.4. A site administrator could save malicious script content through plugin settings, and that script could later run for another user. The risk is narrower because attacker privileges must already be high, but it matters in multisite or restricted-admin environments.
Executive priority
Treat as a targeted WordPress hygiene issue, not an emergency. Patch affected plugin installations, with higher priority for multisite environments and sites where administrator actions affect broader user groups.
Technical view
CVE-2023-2967 is stored cross-site scripting caused by insufficient sanitization and escaping of some plugin settings. The CVSS 3.1 score is 4.8 with PR:H and UI:R, scope changed, and low confidentiality and integrity impact. The described affected range is TinyMCE Custom Styles before 1.1.4.
Likely exposure
Exposure is likely limited to WordPress sites running TinyMCE Custom Styles versions before 1.1.4, especially multisite deployments where unfiltered_html is intentionally blocked for administrators.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. WPScan is tagged with exploit, indicating public technical exploit information may exist, but the source bundle does not establish real-world exploitation.
Researcher notes
The key exposure is privilege-bound stored XSS in plugin settings despite unfiltered_html restrictions. Evidence is limited to the CVE description, CVSS data, and WPScan reference; do not assume affected forks, broader WordPress core impact, or active exploitation.
Mitigation direction
- Upgrade TinyMCE Custom Styles to version 1.1.4 or later.
- Check vendor or WordPress plugin guidance for any additional remediation.
- Restrict plugin settings access to trusted administrators only.
- Prioritize multisite environments where unfiltered_html is disabled by policy.
Validation and detection
- Inventory WordPress sites for TinyMCE Custom Styles installations and versions.
- Flag any instance running a version before 1.1.4.
- Review multisite deployments using restricted administrator HTML permissions.
- Inspect plugin settings for unexpected script-like content or unauthorized changes.
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-2023-2967 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
- 4.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/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:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://wpscan.com/vulnerability/9afec4aa-1210-4c40-b566-64e37acf2b64CVE reference · exploit, vdb-entry
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.