The Flexible Captcha WordPress plugin through 4.1 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Flexible_captcha | Flexible_captcha_project | * | 4.1 (including) |