What’s Vulnerable › Vulnerabilities

CVE-2021-24517: Stop Spammers Security < 2021.18 - Authenticated Stored XSS

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-06 · updated 2026-06-17
• Weakness: CWE-79

Description

The Stop Spammers Security | Block Spam Users, Comments, Forms WordPress plugin before 2021.18 does not escape some of its settings, allowing high privilege users such as admin to set Cross-Site Scripting payloads in them even when the unfiltered_html capability is disallowed

Affected products

• Stop Spammers Security | Block Spam Users, Comments, Forms: before 2021.18 — fixed in 2021.18

How to fix

Upgrade to a fixed version: Stop Spammers Security | Block Spam Users, Comments, Forms 2021.18. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/f440edd8-94fe-440a-8a5b-e3d24dcfcbc1
• https://wpscan.com/vulnerability/f440edd8-94fe-440a-8a5b-e3d24dcfcbc1

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