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CVE-2021-45821

28
FAUCET Score

CVE-2021-45821 is a high-severity blind SQL injection vulnerability affecting Xbtit 3.1, specifically in the ajaxchat/getHistoryChatData.php file. A registered user can exploit this flaw to extract sensitive data like usernames and passwords, and potentially achieve remote code execution. With a CVSS score of 8.8 (High), this vulnerability has a low attack complexity and requires only low privileges, posing a significant risk to confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit or Nuclei, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.1CPE matchmatch criteria
cpe:2.3:a:btiteam:xbtit:3.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.50%
Probability of exploitation in next 30 days
EPSS Percentile
83.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0250 is in the 81st percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

emaragkos.gr / infosec-adventures/xbtit-3-1-sql-njection
ExploitThird Party Advisory
github.com / btiteam/xbtit-3.1/blob/master/ajaxchat/getHistoryChatData.php
ExploitThird Party Advisory
github.com / btiteam/xbtit-3.1/issues/6
ExploitThird Party Advisory