TI-2026-63812 Aliases CVE-2026-96573 GHSA-8899-xhvc-pc43

Cross-site scripting in codepeople Appointment Hour Booking – Booking Calendar

LOW 31CWE-79Published 2026-10-01 · Updated 2026-10-01

Key facts

Attack vector: Network
Privileges required: None
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 Hour Booking – Booking Calendar plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via Booking Form Single-Line Field via Schedule Calendar List Renderer in all versions up to, and including, 1.5.97 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the 'list_readmore_numberofwords' Other Parameters setting to be configured with a positive integer value; the default value of 0 bypasses the decode-and-truncate branch entirely and is not exploitable through this sink.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00259 17th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
codepeople	Appointment Hour Booking – Booking Calendar	up to 1.5.97	—	No fix listed	CNA

Appointment Hour Booking – Booking Calendar Vendorcodepeople Affected up to 1.5.97 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:dwbooster:appointment_hour_booking::::::::	—	—	dwbooster

cpe:2.3:a:dwbooster:appointment_hour_booking:*:*:*:*:*:*:*:* Versions — — ·dwbooster

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-96573
2026-10-03 Alias added: GHSA-8899-xhvc-pc43

References

Other 7

TI-2024-00790 Booking Calendar < 1.3.83 - CSRF appointment scheduling CVSS 3.1HIGH 8.8
TI-2024-11385 BookingPress < 1.1.23 - Unauthenticated Export File Download CVSS 3.1HIGH 7.5
TI-2024-03387 Smart Image Gallery < 1.0.19 - Update/Delete Google API Key via CSRF CVSS 3.1MEDIUM 6.8
TI-2023-05486 Contact Form Email < 1.3.44 - Editor+ Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.1
TI-2024-08220 Polls CP <= 1.0.75 - Admin+ Stored XSS via Custom Styles CVSS 3.1MEDIUM 5.4
TI-2024-08217 Polls CP <= 1.0.75 - Admin+ Stored Cross-Site Scripting CVSS 3.1MEDIUM 5.4

See all 129 →

Sources

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