CVE-2021-24863

Name: CVE-2021-24863
Creator: NVD / NIST
Published: 2021-12-13T11:15:09.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.57%

Last modified Jun 17, 2026

CVE-2021-24863 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.57% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.57%

72.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Billminozzi	Stop Bad Bots	< 6.67

References

https://wpscan.com/vulnerability/1e4dd002-6c96-44f9-bd55-61359265f7aeExploit, Third Party Advisory
https://wpscan.com/vulnerability/1e4dd002-6c96-44f9-bd55-61359265f7aeExploit, Third Party Advisory

Timeline

Published: Dec 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24863?

How severe is CVE-2021-24863?

CVE-2021-24863 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.57% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24863?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24863?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST