Security readout for executives and security teams
Plain-English summary
This affects the WordPress Extra User Details plugin through version 0.5. A site administrator could store script content that later runs in another user’s browser. The issue is medium severity because exploitation requires admin-level access and user interaction, but successful abuse can still affect confidentiality, integrity, and availability in the affected browser session.
Executive priority
Treat as a targeted cleanup item, not an emergency based on current evidence. Prioritize sites with many administrators, shared admin access, or sensitive authenticated users because stored XSS can undermine trust in administrative workflows.
Technical view
CVE-2023-35878 is an authenticated admin-plus stored XSS issue in Vadym K. Extra User Details for WordPress, mapped to CWE-79. The CVSS 3.1 score is 5.9 with network attack vector, low complexity, high privileges required, user interaction required, and changed scope. Exact affected-version metadata is limited, but the description states versions <= 0.5.
Likely exposure
Exposure is limited to WordPress sites using Extra User Details, especially installations on version 0.5 or earlier. The source bundle does not identify affected CPEs or hosting platforms. Sites without this plugin are not indicated as affected.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. Abuse requires an authenticated administrator or higher and another user interaction path where stored content is rendered in the browser.
Researcher notes
Evidence is sparse beyond CVE and Patchstack. The affected range is described as <= 0.5, while structured version data is not detailed. Do not assume a fixed version, exploit availability, or broader product impact without vendor confirmation.
Mitigation direction
- Inventory WordPress sites for the Extra User Details plugin and installed version.
- Check vendor or Patchstack guidance for any fixed release or official remediation.
- Disable or remove the plugin where it is unnecessary.
- Restrict administrator access to trusted users with strong authentication.
- Review admin accounts and recent privileged changes for suspicious activity.
Validation and detection
- Confirm whether Extra User Details is installed on each WordPress site.
- Record plugin version and compare against the <= 0.5 description.
- Review stored extra user detail content for unexpected script-like entries.
- Check WordPress audit logs for unusual administrator activity.
- Validate remediation in staging before changing production sites.
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-2023-35878 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.