Description
WordPress Plugin Spider Calendar is prone to an SQL injection and a cross-site scripting vulnerability. Exploiting these issues could allow an attacker to steal cookie-based authentication credentials, compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database. WordPress Plugin Spider Calendar version 1.0.1 is vulnerable; other versions may also be affected.
Remediation
Update to plugin version 1.1.3 or latest
References
http://www.exploit-db.com/exploits/21715/
http://packetstormsecurity.com/files/117078/WordPress-Spider-1.0.1-SQL-Injection-XSS.html
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