Stop Spammers <= 2021.8 - Reflected Cross-Site Scripting

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2021-24245
CVSS 6.1 (Medium)
Publicly Published April 8, 2021
Last Updated January 22, 2024
Researcher Hosein_vita


The Stop Spammers WordPress plugin before 2021.9 did not escape user input when blocking requests (such as matching a spam word), outputting it in an attribute after sanitising it to remove HTML tags, which is not sufficient and lead to a reflected Cross-Site Scripting issue.



Vulnerability Details for Anti-Spam: Spam Protection | Block Spam Users, Comments, Forms

Software Type Plugin
Software Slug stop-spammer-registrations-plugin (view on
Patched? Yes
Remediation Update to version 2021.9, or a newer patched version
Affected Version
  • < 2021.9
Patched Version
  • 2021.9

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