Security readout for executives and security teams
Plain-English summary
A WordPress site using MF Gig Calendar 1.2 or earlier can let a logged-in contributor store script content that later runs in another user's browser. This can expose session data, change page content, or support account abuse, especially if an administrator views the affected calendar content.
Executive priority
Treat this as a moderate WordPress plugin risk. It is not KEV-listed in the supplied data, but it can affect administrator sessions if vulnerable plugin content is viewed. Prioritize internet-facing or multi-author sites first.
Technical view
CVE-2023-37970 is an authenticated contributor-level stored XSS in Matthew Fries MF Gig Calendar for WordPress, affecting versions up to 1.2. CVSS 3.1 is 6.5 with low attack complexity, low privileges required, user interaction required, and changed scope. The source bundle does not identify a fixed version.
Likely exposure
Exposure is limited to WordPress sites that have the MF Gig Calendar plugin installed at version 1.2 or earlier and allow contributor or higher accounts. Risk increases where contributor accounts are broadly assigned or externally managed.
Exploitation context
The CVE record and Patchstack entry describe authenticated stored XSS. CISA KEV status is false in the source bundle, and no cited source here confirms active exploitation. Exploitation would require a logged-in contributor-level user and a later user interaction.
Researcher notes
The source bundle provides vulnerability class, privilege requirement, CVSS vector, affected plugin, and version ceiling. It does not provide vulnerable parameter details, proof of concept, fixed version, or vendor advisory content. Avoid assuming exploit availability or remediation beyond checking vendor guidance and reducing plugin exposure.
Mitigation direction
- Inventory WordPress sites for the MF Gig Calendar plugin and version.
- Check Patchstack and plugin maintainer guidance for a fixed release or retirement status.
- Disable or remove the plugin where business use is not confirmed.
- Restrict contributor-level access to trusted users only.
- Prioritize review on sites where administrators view contributor-created content.
Validation and detection
- Confirm whether package mf-gig-calendar is installed on each WordPress site.
- Record installed plugin versions and flag version 1.2 or earlier.
- Review WordPress accounts with contributor or higher privileges.
- Check whether calendar content is editable by non-administrators.
- Review recent calendar content changes for unexpected script-like markup.
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-2023-37970 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
- 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.