Subscriber cross-site scripting
Published Aug 20, 2026 · Updated Aug 20, 2026
Cross-site scripting in WP BASE Booking before 6.4.0 allows remote authenticated users to execute script in another user's browser. Patchstack and the vendor changelog confirm the issue was addressed across three consecutive releases, but public records do not identify the vulnerable parameter, page, or client-side sink that handles subscriber-controlled input unsafely. Subscriber-level access is required and user interaction is implied by the published CVSS, so triage should focus on deployments where lower-privileged users can submit booking data that administrators or other users later render.
Summary
What happened
Cross-site scripting in WP BASE Booking before 6.4.0 allows remote authenticated users to execute script in another user's browser. Patchstack and the vendor changelog confirm the issue was addressed across three consecutive releases, but public records do not identify the vulnerable parameter, page, or client-side sink that handles subscriber-controlled input unsafely. Subscriber-level access is required and user interaction is implied by the published CVSS, so triage should focus on deployments where lower-privileged users can submit booking data that administrators or other users later render.
The record
- CVE
- CVE-2026-73402
- Published
- Aug 20, 2026
- Updated
- Aug 20, 2026
- Vendor
- Hakan Ozevin
- Product
- WP BASE Booking of Appointments, Services and Events
- Classifications
- CWE-79, CAPEC-588, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 20, 2026CVE publishedPublication date reported by the CVE source.
- Aug 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=n/a <=6.3.2 changes=[{"at":"6.4.0","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo