Security readout for executives and security teams
Plain-English summary
CVE-2026-1044 is a stored cross-site scripting issue in the WordPress Tennis Court Bookings plugin through version 1.2.7. It requires an authenticated administrator-level user and mainly matters on multisite WordPress or sites where unfiltered_html is disabled. Business urgency is moderate because exploitation needs high privileges, but successful abuse can affect users who view injected pages.
Executive priority
Treat as a moderate-priority WordPress hygiene issue. Prioritize sites using multisite, shared administration, or third-party site managers. This is not a broad unauthenticated takeover risk based on current sources, but it can create persistent browser-side impact if an administrator account is misused.
Technical view
The plugin insufficiently sanitizes and escapes values in admin settings and calendar-related parameters, allowing stored script injection. CVSS is 4.4, network-accessible, high complexity, high privileges required, scope changed, with low confidentiality and integrity impact. The CVE maps to CWE-79 and is limited by WordPress configuration conditions described in the record.
Likely exposure
Exposure is likely limited to WordPress sites running Tennis Court Bookings version 1.2.7 or earlier, especially multisite installations or sites with unfiltered_html disabled. Single-site installations where administrators retain unfiltered_html may not be affected under the CVE description.
Exploitation context
No active exploitation is indicated in the provided sources, and the CVE is not listed as KEV. Abuse requires administrator-level access, so the main concern is malicious, compromised, or delegated administrators placing persistent script content that later executes for visitors to affected pages.
Researcher notes
The cited Trac locations point to settings and calendar form handling in version 1.2.7. Public sources identify the sink class as insufficient sanitization and escaping, but the bundle does not name a fixed version or provide evidence of exploitation. Validate impact only in authorized test environments.
Mitigation direction
- Check the WordPress plugin page or vendor guidance for a fixed release.
- Update Tennis Court Bookings if a version newer than 1.2.7 is available and confirmed fixed.
- Disable or remove the plugin if it is not operationally required.
- Restrict administrator access to trusted accounts only.
- Review delegated admin roles on multisite WordPress installations.
Validation and detection
- Inventory WordPress sites for the Tennis Court Bookings plugin.
- Confirm whether installed versions are 1.2.7 or earlier.
- Determine whether the site is WordPress multisite.
- Check whether unfiltered_html has been disabled.
- Review plugin settings and calendar content for unexpected script-like entries.
- Monitor for vendor advisories or Wordfence updates on fixed versions.
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-2026-1044 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
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/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:H/PR:H/UI:N/S:C/C:L/I:L/A:N1.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/99b91fb6-9e60-447d-ab43-2be231052140?source=cveCVE reference
- https://downloads.wordpress.org/plugin/tennis-court-bookings.zipCVE reference
- https://wordpress.org/plugins/tennis-court-bookings/CVE reference
- https://plugins.trac.wordpress.org/browser/tennis-court-bookings/tags/1.2.7/views/setting.php#L65CVE reference
- https://plugins.trac.wordpress.org/browser/tennis-court-bookings/tags/1.2.7/views/calendar_form.php#L43CVE 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.