CVE-2021-24863: StopBadBots < 6.67 - Unauthenticated SQL Injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-13 · updated 2026-06-17
Weakness: CWE-89

Description

The WP Block and Stop Bad Bots Crawlers and Spiders and Anti Spam Protection Plugin StopBadBots WordPress plugin before 6.67 does not sanitise and escape the User Agent before using it in a SQL statement to save it, leading to a SQL injection

Affected products

WP Block and Stop Bad Bots Crawlers and Spiders and Anti Spam Protection Plugin StopBadBots: before 6.67 — fixed in 6.67

How to fix

Upgrade to a fixed version: WP Block and Stop Bad Bots Crawlers and Spiders and Anti Spam Protection Plugin StopBadBots 6.67. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/1e4dd002-6c96-44f9-bd55-61359265f7ae
https://wpscan.com/vulnerability/1e4dd002-6c96-44f9-bd55-61359265f7ae

Get alerted when CVE-2021-24863 or the next vulnerability affects your stack