phpwarden
FeaturesComparePricingAdvisoriesBlogDocsChangelogLog in
Log inStart free

CVE-2021-24225: The Advanced Booking Calendar WordPress plugin before 1.6.7 did not sanitise the calId GET parameter in the "Seasons & Calendars" page before outputing it in an A tag, leading to a reflected XSS issue

medium Affects advanced-booking-calendar (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

The Advanced Booking Calendar WordPress plugin before 1.6.7 did not sanitise the calId GET parameter in the "Seasons & Calendars" page before outputing it in an A tag, leading to a reflected XSS issue

Package
advanced-booking-calendar (WordPress plugin) WordPress
Affected versions
<1.6.7
Fixed in
1.6.7
Severity
medium  CVSS 5.4
Exploitation
not on CISA KEV · EPSS 1% (52.7th percentile)
Published
2021-04-12
Source
nvd

References

CWE-79
NVD recordadvanced-booking-calendar (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs   How findings are ranked

Related advisories