Stop Spammers Classic <= 2026.3 - Unauthenticated Stored Cross-Site Scripting

7.2
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2026-48876
CVSS 7.2 (High)
Publicly Published June 1, 2026
Last Updated June 8, 2026
Researcher Peleg Nagli (ultrared.ai)

Description

The Stop Spammers Classic plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2026.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for Stop Spammers Classic

Software Type Plugin
Software Slug stop-spammer-registrations-plugin (view on wordpress.org)
Patched? Yes
Remediation Update to version 2026.4, or a newer patched version
Affected Version
  • <= 2026.3
Patched Version
  • 2026.4

Recent vulnerabilities in Stop Spammers Classic

# Title CVE ID CVSS Researchers Date
1 Stop Spammers Classic <= 2026.1 - Cross-Site Request Forgery via Email Allowlist CVE-2025-14795 4.3 JoanClarke2 January 27, 2026
2 Anti-Spam: Spam Protection | Block Spam Users, Comments, Forms <= 2024.7 - Cross-Site Request Forgery to Multiple Administrative Actions CVE-2025-2935 5.4 Noah Stead (TurtleBurg) June 5, 2025
3 Stop Spammers Security | Block Spam Users, Comments, Forms <= 2024.4 - Cross-Site Request Forgery (CSRF) via sfs_process CVE-2023-7065 5.4 Lucio Sá May 3, 2024
4 Stop Spammers Security <= 2022.6 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2023-2489 4.4 Erwan LR May 15, 2023
5 Stop Spammers Security <= 2022.6 - Reflected Cross-Site Scripting CVE-2023-2488 6.1 Erwan LR May 15, 2023
6 Stop Spammers Security <= 2022.5 - Unauthenticated PHP Object Injection CVE-2022-4120 9.8 Seryeon Ham December 5, 2022
7 Stop Spammers Security <= 2021.17 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2021-24517 4.8 swapnil subhash bodekar August 9, 2021
8 Stop Spammers <= 2021.8 - Reflected Cross-Site Scripting CVE-2021-24245 6.1 Hosein_vita April 8, 2021

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