CVE-2024-13431: Appointment Booking Calendar (WordPress plugin) · Cross-site Scripting
Affects Appointment Booking Calendar (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 6.1 Medium.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 30% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 7 Mar 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin | Affected
| Fixed in– |
AI-suggested
Until a patch or official fix is available, users should avoid clicking on suspicious links involving the affected plugin parameters. Monitoring vendor channels for updates is recommended.
Description
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the accent_color and background parameter in all versions up to, and including, 1.6.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
References
- wordfence.com/threat-intel/vulnerabilities/id/f6e3e5dd-b9f1-4d24-98cc-b6ab319434e4?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/changeset/3246760/simply-schedule-appointments/trunk/booking-app-new/iframe-inner.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.8.3/booking-app-new/iframe-inner.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.8.3/includes/class-styles.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.8.3/includes/class-styles.php (opens in a new tab)
- blog.lucianohanna.com.br/security/cve/cve-2024-13431-reflected-xss-no-simply-schedule-appointments/ (opens in a new tab)