CVE-2024-8663: The WP Simple Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the

Q: How do I fix CVE-2024-8663?

wp simple booking calendar: upgrade to 2.0.11. Exact commands for each OS are on this page.

Q: Is CVE-2024-8663 being exploited?

CVE-2024-8663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-8663 affect?

CVE-2024-8663 affects wp simple booking calendar. Severity is medium (CVSS 6.1). The WP Simple Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.0.10. Thi

Q: How urgent is CVE-2024-8663?

Priority 31/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2024-8663 is a medium-severity flaw (CVSS 6.1) affecting wp simple booking calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The WP Simple Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.0.10. 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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-09-13
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: wpsimplebookingcalendar

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-09-13 07:15 UTCPublished CVE record published
2026-06-17 08:23 UTCUpdated Record last modified

wpsimplebookingcalendar wp simple booking calendar UPGRADE

Affected: < 2.0.11

Fixed in: 2.0.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wp-simple-booking-calendar || rpm -q wp-simple-booking-calendar || wp-simple-booking-calendar --version

2. UPGRADE to 2.0.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wp-simple-booking-calendar

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wp-simple-booking-calendar

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-8663?

wp simple booking calendar: upgrade to 2.0.11. Exact commands for each OS are on this page.

Is CVE-2024-8663 being exploited?

CVE-2024-8663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-8663 affect?

CVE-2024-8663 affects wp simple booking calendar. Severity is medium (CVSS 6.1). The WP Simple Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.0.10. Thi

How urgent is CVE-2024-8663?

Priority 31/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2023-51525 MEDIUM 4.3 UPGRADE Cross-Site Request Forgery (CSRF) vulnerability in Veribo, Roland Murg WP Simple Booking Calendar.This issue a

References

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