Security readout for executives and security teams
Plain-English summary
CVE-2026-2431 affects the CM Custom Reports WordPress plugin through version 1.2.7. An attacker can craft a link that, if clicked by a user, runs unwanted script in that user’s browser. This is a user-interaction issue, not automatic server takeover. It can still expose session-related data or alter what the user sees.
Executive priority
Treat as a near-term web application hygiene issue. Prioritize sites where the plugin is active and administrators handle external links. It is not currently supported as actively exploited in the provided sources, but remediation should not wait if the plugin is broadly deployed.
Technical view
The vulnerability is reflected cross-site scripting in the date_from and date_to parameters due to insufficient input sanitization and output escaping. It is unauthenticated, network-accessible, requires user interaction, and is scored CVSS 3.1 6.1. The weakness maps to CWE-79. Sources identify affected versions up to and including 1.2.7.
Likely exposure
Exposure is limited to WordPress sites running CM Custom Reports version 1.2.7 or earlier. Risk is higher where administrators or privileged users may click untrusted report links while authenticated.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires tricking a user into opening a crafted URL. Successful abuse could execute script in the victim’s browser context.
Researcher notes
Evidence identifies reflected XSS in RegisteredUsersReport.php-related handling of date_from and date_to. The bundle cites WordPress Trac paths for trunk and tag 1.2.7, but does not provide a clear fixed version. Avoid assuming remediation beyond vendor guidance.
Mitigation direction
- Inventory WordPress sites for CM Custom Reports installations.
- Identify any installations at version 1.2.7 or earlier.
- Check vendor and Wordfence guidance for a fixed release or official mitigation.
- Disable or remove the plugin if it is not business-critical.
- Warn administrators not to open untrusted report links.
Validation and detection
- Confirm plugin name and installed version from WordPress administration or asset inventory.
- Review web logs for unusual date_from or date_to parameter values.
- Validate that user-supplied date parameters are safely encoded in rendered pages.
- Retest after vendor-directed remediation in a staging environment.
- Monitor Wordfence or CVE updates for changed affected-version or fix information.
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-2026-2431 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e9b918e1-9bf7-4f90-9e77-829bc8012cbb?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/cm-custom-reports/trunk/backend/reports/RegisteredUsersReport.php#L19CVE reference
- https://plugins.trac.wordpress.org/browser/cm-custom-reports/tags/1.2.7/backend/reports/RegisteredUsersReport.php#L19CVE reference
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.