Security readout for executives and security teams
Plain-English summary
CVE-2023-51504 is a stored cross-site scripting issue in Dan's Embedder for Google Calendar for WordPress through version 1.2. A logged-in user with some privileges could save content that later runs script in another user's browser. Business risk is moderate, with no cited evidence of active exploitation.
Executive priority
Handle as a moderate-priority WordPress plugin remediation. It is not marked as known exploited, but stored XSS can affect trust, site integrity, and administrator sessions when vulnerable plugins remain installed.
Technical view
The issue is CWE-79 improper neutralization during page generation. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, score 6.5. The source bundle identifies the affected WordPress plugin package as dans-gcal, through version 1.2.
Likely exposure
Exposure is limited to WordPress sites that have Dan's Embedder for Google Calendar installed at version 1.2 or earlier. The CVSS vector indicates an attacker needs low privileges and user interaction, so anonymous exploitation is not established by the supplied sources.
Exploitation context
The source bundle does not cite CISA KEV listing or other evidence of active exploitation. Stored XSS can become more serious when privileged WordPress users view attacker-controlled content, but the supplied sources do not provide exploit prevalence or detailed attack conditions.
Researcher notes
Evidence is limited to CVE metadata and the Patchstack vulnerability entry. The bundle does not name a fixed version, patch commit, or exploit status. Avoid assuming broader WordPress impact beyond Dan's Embedder for Google Calendar through version 1.2.
Mitigation direction
- Inventory WordPress sites for the dans-gcal plugin and record installed versions.
- Check vendor or Patchstack guidance for an available fixed release or official mitigation.
- Disable or remove the plugin where no trusted fixed version is available.
- Restrict WordPress accounts that can create or edit plugin-controlled calendar content.
- Prioritize sites with multiple contributors or exposed content-submission workflows.
Validation and detection
- Confirm whether Dan's Embedder for Google Calendar is installed on each WordPress site.
- Verify plugin version and treat version 1.2 or earlier as affected.
- Review privileged user activity for unexpected plugin content or calendar embed changes.
- Confirm only trusted users can edit content rendered by the plugin.
- Document remediation status and any compensating access restrictions.
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-2023-51504 mapping review
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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.