CVE-2020-24313

Name: CVE-2020-24313
Creator: NVD / NIST
Published: 2020-08-26T13:15:10.907+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.15%

Last modified Jun 17, 2026

CVE-2020-24313 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Etoile Web Design Ultimate Appointment Booking & Scheduling WordPress Plugin v1.1.9 and lower does not sanitize the value of the "Appointment_ID" GET parameter before echoing it back out inside an input tag. This results in a reflected XSS vulnerability that attackers can exploit with a specially crafted URL.. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

Description

Etoile Web Design Ultimate Appointment Booking & Scheduling WordPress Plugin v1.1.9 and lower does not sanitize the value of the "Appointment_ID" GET parameter before echoing it back out inside an input tag. This results in a reflected XSS vulnerability that attackers can exploit with a specially crafted URL.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.15%

62.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Etoilewebdesign	Ultimate Appointment Booking \& Scheduling	<= 1.1.9

References

https://wordpress.org/plugins/ultimate-appointment-scheduling/Product, Third Party Advisory
https://zeroaptitude.com/zerodetail/wordpress-plugin-bug-hunting-part-1/Exploit, Third Party Advisory, URL Repurposed
https://wordpress.org/plugins/ultimate-appointment-scheduling/Product, Third Party Advisory
https://zeroaptitude.com/zerodetail/wordpress-plugin-bug-hunting-part-1/Exploit, Third Party Advisory, URL Repurposed

Timeline

Published: Aug 26, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24313?

How severe is CVE-2020-24313?

CVE-2020-24313 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24313?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-24313?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST