CVE-2021-24614: Book appointment Online < 1.39 - Authenticated Stored Cross-Site Scripting (XSS)

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-09-13 · updated 2026-06-17
Weakness: CWE-79

Description

The Book appointment online WordPress plugin before 1.39 does not sanitise or escape Service Prices before outputting it in the List, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

Affected products

Book appointment online: before 1.39 — fixed in 1.39

How to fix

Upgrade to a fixed version: Book appointment online 1.39. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/e8b5c609-dc67-4dce-b6bb-7d63c0c2a014
https://wpscan.com/vulnerability/e8b5c609-dc67-4dce-b6bb-7d63c0c2a014

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