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TI-2024-03991 Aliases CVE-2024-4288GHSA-gqvv-5f2f-89ff

Cross-site scripting in croixhaug Appointment Booking Calendar — Simply Schedule…

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘link’ parameter in versions up to, and including, 1.6.7.14 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00322 25th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
croixhaugAppointment Booking Calendar — Simply Schedule Appointments Booking Pluginup to 1.6.7.14—No fix listedCNA
  • Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin Vendorcroixhaug Affected up to 1.6.7.14 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nsquared:simply_schedule_appointments:*:*:*:*:*:wordpress:*:*before 1.6.7.18Vulnerablecroixhaug
  • cpe:2.3:a:nsquared:simply_schedule_appointments:*:*:*:*:*:wordpress:*:* Versions before 1.6.7.18 Vulnerable ·croixhaug

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-4288
  2. 2026-10-03 Alias added: GHSA-gqvv-5f2f-89ff

References

Patch 1

Advisory 1

Other 1

  • TI-2024-02177 SQL injection in croixhaug Appointment Booking Calendar — Simply Schedule Appointments… CVSS 3.1HIGH 8.8
  • TI-2024-02176 SQL injection in croixhaug Appointment Booking Calendar — Simply Schedule Appointments… CVSS 3.1HIGH 8.8
  • TI-2024-01637 Cross-site request forgery in croixhaug Appointment Booking Calendar — Simply Schedule… CVSS 3.1MEDIUM 4.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences