Security readout for executives and security teams
Plain-English summary
This vulnerability affects the WordPress SMTP2GO – Email Made Easy plugin up to version 1.4.2. A WordPress administrator could store malicious script content that later runs in another user’s browser. Business impact is usually limited by the admin-level access requirement, but compromised admin accounts could turn this into site or data exposure risk.
Executive priority
Treat this as a moderate-priority WordPress hygiene issue. It is not known to be actively exploited from the supplied sources, but affected sites should be identified and remediated because admin compromise could make the XSS meaningful.
Technical view
CVE-2023-28496 is an authenticated stored cross-site scripting issue in SMTP2GO – Email Made Easy for WordPress, reported as affecting versions <= 1.4.2. It is CWE-79 with CVSS 3.1 score 5.9: AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L. The provided sources do not describe a fixed version or detailed vulnerable field.
Likely exposure
Exposure is likely limited to WordPress sites using the SMTP2GO plugin at version 1.4.2 or earlier. The attacker needs administrator-level WordPress access, so risk is highest where admin accounts are shared, weakly protected, or already compromised.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no source provided here claims active exploitation. Stored XSS still matters because it can persist in site settings or content and execute when a user views the affected area.
Researcher notes
The record identifies authenticated admin+ stored XSS but does not include vulnerable parameters, proof-of-concept details, or fixed-version data in the supplied bundle. Avoid assuming broader unauthenticated exposure. Validation should focus on version inventory, vendor advisory review, and safe configuration inspection.
Mitigation direction
- Inventory WordPress sites for the SMTP2GO plugin and version.
- Check SMTP2GO, WordPress.org, and Patchstack guidance for a fixed release.
- Update the plugin if a vendor-supported fixed version is available.
- Disable or replace the plugin if no safe update is available.
- Limit WordPress admin access and enforce MFA for administrator accounts.
- Review recent admin changes for unexpected script-like content.
Validation and detection
- Confirm whether SMTP2GO – Email Made Easy is installed.
- Record the installed version and compare against <= 1.4.2.
- Review plugin changelog or vendor advisory for fix confirmation.
- Audit administrator accounts for unnecessary or stale access.
- Inspect relevant plugin settings for suspicious stored content.
- Verify remediation in staging before production rollout.
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-2023-28496 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
- 5.9 (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: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:H/UI:R/S:C/C:L/I:L/A:L1.73.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/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.