CVE-2021-45822

Name: CVE-2021-45822
Creator: NVD / NIST
Published: 2022-03-16T16:15:10.757+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.04%

Last modified Jun 17, 2026

CVE-2021-45822 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A cross-site scripting vulnerability is present in Xbtit 3.1. The stored XSS vulnerability occurs because /ajaxchat/sendChatData.php does not properly validate the value of the "n" (POST) parameter. EPSS estimates a 1.04% chance of exploitation in the next 30 days.

Description

A cross-site scripting vulnerability is present in Xbtit 3.1. The stored XSS vulnerability occurs because /ajaxchat/sendChatData.php does not properly validate the value of the "n" (POST) parameter. Through this vulnerability, an attacker is capable to execute malicious JavaScript code.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.04%

59.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Btiteam	Xbtit	3.1

References

https://emaragkos.gr/infosec-adventures/xbtit-3-1-xss-stored-amp-reflected/Exploit, Third Party Advisory
https://github.com/btiteam/xbtit-3.1Third Party Advisory
https://github.com/btiteam/xbtit-3.1/issues/7Exploit, Third Party Advisory
https://emaragkos.gr/infosec-adventures/xbtit-3-1-xss-stored-amp-reflected/Exploit, Third Party Advisory
https://github.com/btiteam/xbtit-3.1Third Party Advisory
https://github.com/btiteam/xbtit-3.1/issues/7Exploit, Third Party Advisory

Timeline

Published: Mar 16, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45822?

How severe is CVE-2021-45822?

CVE-2021-45822 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45822?

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-2021-45822?

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

Scan your code now

Source: NVD / NIST