CVE-2021-24807

Name: CVE-2021-24807
Creator: NVD / NIST
Published: 2021-11-08T18:15:10.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.40%

Last modified Jun 17, 2026

CVE-2021-24807 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. The Support Board WordPress plugin before 3.3.5 allows Authenticated (Agent+) users to perform Cross-Site Scripting attacks by placing a payload in the notes field, when an administrator or any authenticated user go to the chat the XSS will be automatically executed.. EPSS estimates a 1.40% chance of exploitation in the next 30 days.

Description

The Support Board WordPress plugin before 3.3.5 allows Authenticated (Agent+) users to perform Cross-Site Scripting attacks by placing a payload in the notes field, when an administrator or any authenticated user go to the chat the XSS will be automatically executed.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

1.40%

68.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schiocco	Support Board	< 3.3.5

References

https://github.com/itsjeffersonli/CVE-2021-24807Exploit, Third Party Advisory
https://medium.com/%40lijohnjefferson/cve-2021-24807-6bc22af2a444
https://wpscan.com/vulnerability/19d101aa-4b60-4db4-a33b-86c826b288b0Exploit, Third Party Advisory
https://github.com/itsjeffersonli/CVE-2021-24807Exploit, Third Party Advisory
https://medium.com/%40lijohnjefferson/cve-2021-24807-6bc22af2a444
https://wpscan.com/vulnerability/19d101aa-4b60-4db4-a33b-86c826b288b0Exploit, Third Party Advisory

Timeline

Published: Nov 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24807?

How severe is CVE-2021-24807?

CVE-2021-24807 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24807?

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-2021-24807?

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

Scan your code now

Source: NVD / NIST