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.
CVE-2021-24245 is a medium severity with CVSS 6.1 Cross-Site Scripting issue affecting the Plugin Stop Spammers Classic. It affects Versions before 2021.9 and is fixed in 2021.9.
CVE-2021-24245 is tracked for the Plugin Stop Spammers Classic as medium severity with CVSS 6.1. The affected range is Versions before 2021.9. Update Stop Spammers Classic to 2021.9 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
stop-spammer-registrations-plugin
View on wordpress.org
|
| CVE | CVE-2021-24245 |
| Patched Versions |
2021.9
|
| Affected Versions |
Versions before 2021.9
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Stop Spammers Security <= 2022.5 - Unauthenticated PHP Object Injection
Stop Spammers Security <= 2022.6 - Reflected Cross-Site Scripting
Anti-Spam: Spam Protection | Block Spam Users, Comments, Forms <= 2024.7 - Cross-Site Request Forgery to Multiple Administrative Actions
Stop Spammers Security | Block Spam Users, Comments, Forms <= 2024.4 - Cross-Site Request Forgery (CSRF) via sfs_process
Stop Spammers Security <= 2021.17 - Authenticated (Admin+) Stored Cross-Site Scripting
Stop Spammers Security <= 2022.6 - Authenticated (Admin+) Stored Cross-Site Scripting
Stop Spammers Classic <= 2026.1 - Cross-Site Request Forgery via Email Allowlist
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