CVE-2021-20840

MEDIUM 6.1CVE-2021-20840 · Published 24/11/2021 · updated 17/06/2026

In short

CVE-2021-20840 is a MEDIUM (CVSS 6.1) vulnerability affecting booking package (saasproject).
Chance of exploitation in the next 30 days (EPSS): 1.3%, higher than 70.2% of all vulnerabilities.
Fix: update to 1.5.11 or later.

Package	Affected versions	Patched versions
booking package saasproject	`< 1.5.11`	`1.5.11`

Description

Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.

References

jvn.jp/en/jp/JVN68066589/index.html · Third Party Advisory
saasproject.net/ja/fixed/20211019.php · Vendor Advisory
wordpress.org/plugins/booking-package · Product

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