CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
What the vulnerability does
The Event post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'events_list' shortcodes in all versions up to, and including, 5.9.9 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Explanation of Vulnerability in Simple Terms
Event Post versions 5.9.9 and earlier contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts into event data that execute in the browsers of other users viewing those events. The vulnerability affects both confidentiality and integrity of site data.
What an attacker can do
Inject malicious scripts that run in other users' browsers when they view event data.
Potential impact on your site
Authenticated users can inject scripts affecting other visitors; site data integrity and user sessions at risk.
Conditions required to exploit
Attacker must have a low-privilege authenticated account on the site.
Key dates
External resources
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