WPCal.io <= 0.9.5.9 - Authenticated (Contributor+) Stored Cross-Site Scripting
Affected versions: *-0.9.5.9
Vulnerability type: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected software, patched versions and attribution
The WPCal.io plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 0.9.5.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
WPCal.io – Easy Meeting Scheduler
Affected versions: *-0.9.5.9
Patched versions: 0.9.5.10
Researcher credit: Peter Thaleikis
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- Published
- December 30, 2025
- CVSS
- 6.4