CVE-2021-45821

Name: CVE-2021-45821
Creator: NVD / NIST
Published: 2022-03-16T15:15:16.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.50%

Last modified Jun 17, 2026

CVE-2021-45821 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A blind SQL injection vulnerability exists in Xbtit 3.1 via the sid parameter in ajaxchat/getHistoryChatData.php file that is accessible by a registered user. As a result, a malicious user can extract sensitive data such as usernames and passwords and in some cases use this vulnerability in order to get a remote code execution on the remote web server.. EPSS estimates a 2.50% chance of exploitation in the next 30 days.

Description

A blind SQL injection vulnerability exists in Xbtit 3.1 via the sid parameter in ajaxchat/getHistoryChatData.php file that is accessible by a registered user. As a result, a malicious user can extract sensitive data such as usernames and passwords and in some cases use this vulnerability in order to get a remote code execution on the remote web server.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.50%

82.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Btiteam	Xbtit	3.1

References

https://emaragkos.gr/infosec-adventures/xbtit-3-1-sql-njection/Exploit, Third Party Advisory
https://github.com/btiteam/xbtit-3.1/blob/master/ajaxchat/getHistoryChatData.phpExploit, Third Party Advisory
https://github.com/btiteam/xbtit-3.1/issues/6Exploit, Third Party Advisory
https://emaragkos.gr/infosec-adventures/xbtit-3-1-sql-njection/Exploit, Third Party Advisory
https://github.com/btiteam/xbtit-3.1/blob/master/ajaxchat/getHistoryChatData.phpExploit, Third Party Advisory
https://github.com/btiteam/xbtit-3.1/issues/6Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-45821?

How severe is CVE-2021-45821?

CVE-2021-45821 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.50% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45821?

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-2021-45821?

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

Scan your code now

Source: NVD / NIST