The Pollin plugin for WordPress suffers from a reflected XSS vulnerability (CWE-79) via the 'question' parameter in all versions up to 1.01.1. Due to inadequate input validation and output encoding, attackers can inject malicious scripts that execute when a user clicks a crafted link. This vulnerability does not require authentication and can lead to partial confidentiality and integrity impacts but no availability impact. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, with low confidentiality and integrity impact and no availability impact.

Successful exploitation allows an unauthenticated attacker to execute arbitrary scripts in the context of the victim's browser session when the victim interacts with a malicious link. This can lead to partial disclosure of information and modification of data accessible to the user session. There is no direct impact on system availability. No known exploits in the wild have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with untrusted links involving the Pollin plugin's 'question' parameter. Consider disabling or removing the vulnerable plugin if possible to mitigate risk.