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PatchSiren cyber security CVE debrief

CVE-2026-5513 ladela CVE debrief

The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'bookly-customer-full-name' cookie in versions up to, and including, 27.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires 'Remember personal information in cookies' setting to be enabled (disabled by default).

Vendor
ladela
Product
Online Scheduling and Appointment Booking System – Bookly
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-13
Original CVE updated
2026-06-15
Advisory published
2026-06-13
Advisory updated
2026-06-15

Who should care

Users of the Online Scheduling and Appointment Booking System – Bookly plugin for WordPress, particularly those with versions up to and including 27.2, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability exists in the Online Scheduling and Appointment Booking System – Bookly plugin for WordPress, specifically in versions up to and including 27.2. It is caused by insufficient input sanitization and output escaping of the 'bookly-customer-full-name' cookie, allowing unauthenticated attackers to inject arbitrary web scripts.

Defensive priority

HIGH

Recommended defensive actions

  • Update the Online Scheduling and Appointment Booking System – Bookly plugin to a version beyond 27.2.
  • Ensure the 'Remember personal information in cookies' setting is disabled if not required.

Evidence notes

The CVE-2026-5513 record and associated details were sourced from official vulnerability databases and sources.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-5513 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-5513

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-5513 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5513

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.