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TI-2026-82292 Aliases CVE-2026-105258GHSA-ffw8-2wfv-h8fc

Stored cross-site scripting in Appointment Booking Plugin forms

Priority LOW 16CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

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

Summary

The Appointment Booking Plugin for WordPress before 5.7.6 does not escape several booking-form step content settings before rendering them (CWE-79). A high-privilege user such as an administrator can inject JavaScript that runs in the browser of any visitor who loads the booking form. On multisite, where administrators lack the unfiltered_html capability, this reaches unauthenticated visitors. An exploit link is listed in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

The Appointment Booking Plugin WordPress plugin before 5.7.6 does not escape several booking-form step content settings before rendering them on the public booking form, allowing high-privilege users such as administrators to inject JavaScript that executes in the browser of any visitor who loads the form; on multisite, where administrators do not hold the unfiltered_html capability, this crosses a privilege boundary to unauthenticated visitors.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00173 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Appointment Booking Plugin (Unknown): 5.7.6

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
UnknownAppointment Booking Pluginbefore 5.7.65.7.6Patch availableCNA
  • Appointment Booking Plugin VendorUnknown Affected before 5.7.6 Fixed in 5.7.6 Patch available CNA

Remediation

Update the Appointment Booking Plugin to version 5.7.6, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Appointment Booking Plugin (Unknown) Fixed in 5.7.6

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-105258
  2. 2026-10-29 Alias added: GHSA-ffw8-2wfv-h8fc
  3. 2026-10-29 CVSS score added · CISA ADP
  4. 2026-10-29 Weakness changed · CISA ADP
  5. 2026-10-29 CISA SSVC decision points changed

References

Exploit 1

Sources

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