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Tool Directory

CVE-2021-24245

MediumPublished

Stop Spammers < 2021.9 - Reflected Cross-Site Scripting (XSS)

Published: May 5, 2021
Updated: Aug 3, 2024
Assigning CNA: WPScan
Evidence observed: May 19, 2021

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

5.7%

Low · next 30 days

Percentile: 92.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

WordPress Plugin Stop Spammers 2021.8 - 'log' Reflected Cross-site Scripting (XSS)Exploit
Hosein Vita · php · May 19, 2021

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