The seosbg Survey WordPress plugin versions up to 1.1 suffer from a stored cross-site scripting vulnerability (CWE-79) due to improper neutralization of input during web page generation. Authenticated administrators can inject malicious scripts via the plugin's admin settings, which are then stored and executed in the context of users visiting the affected pages. This vulnerability affects multi-site WordPress setups and installations where unfiltered_html is disabled, increasing the risk of script injection and potential session hijacking or other script-based attacks. The CVSS 3.1 score is 4.4, reflecting a medium impact with network attack vector, high attack complexity, and requiring high privileges but no user interaction.

An attacker with administrator-level access can inject persistent malicious scripts into pages generated by the Survey plugin. These scripts execute in the browsers of users who visit the affected pages, potentially leading to information disclosure or session hijacking. The vulnerability does not affect single-site installations or those with unfiltered_html enabled. There are no reports of active exploitation in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict administrator access to trusted users only and consider disabling or removing the Survey plugin in multi-site environments or where unfiltered_html is disabled. Monitor for vendor updates regarding patches or official fixes.