Security readout for executives and security teams
Plain-English summary
CVE-2023-23735 affects the WordPress Spectra Gutenberg Blocks plugin up to version 2.3.0. An unauthenticated attacker may inject HTML into email-related output, creating a low-integrity web injection risk. Sources do not show confidentiality or availability impact, and there is no KEV evidence of active exploitation.
Executive priority
Treat as a moderate web application integrity issue. Prioritize internet-facing WordPress sites using Spectra, especially where email content reaches customers or staff. It is not presented as data theft or service outage risk in the sources.
Technical view
The issue is classified as CWE-80, improper neutralization of script-related HTML tags. CVSS 3.1 is 5.3: network-accessible, low complexity, no privileges, no user interaction, unchanged scope, no confidentiality or availability impact, and low integrity impact. The package name is ultimate-addons-for-gutenberg.
Likely exposure
Exposure is likely limited to WordPress sites running Brainstorm Force Spectra, package ultimate-addons-for-gutenberg, version 2.3.0 or earlier. Sites not using this plugin are not indicated as affected in the provided sources.
Exploitation context
The source bundle describes unauthenticated email HTML injection, but provides no public exploit confirmation. The CVE is not listed as KEV, so active exploitation should not be assumed from these sources.
Researcher notes
Evidence is limited to the CVE record and Patchstack reference. The vulnerability is described as unauthenticated HTML injection affecting Spectra through 2.3.0. No exploit details, fixed version text, or active exploitation evidence are included in the provided bundle.
Mitigation direction
- Inventory WordPress sites for the Spectra or ultimate-addons-for-gutenberg plugin.
- Review vendor and Patchstack guidance for the corrected version or recommended mitigation.
- Upgrade beyond version 2.3.0 where vendor guidance confirms availability.
- Disable the plugin temporarily if exposure exists and upgrade guidance cannot be confirmed.
- Monitor affected sites for suspicious injected HTML in email-related content.
Validation and detection
- Confirm whether Spectra or ultimate-addons-for-gutenberg is installed on each WordPress site.
- Record installed plugin versions and flag versions 2.3.0 or earlier.
- Confirm remediation against vendor or Patchstack guidance, not assumptions.
- Review logs and generated email content for unexpected HTML injection indicators.
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-80: 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-2023-23735 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
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N/UI:N/S:U/C:N/I:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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 Script-Related HTML Tags in a Web Page (Basic XSS)
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.