How severe is CVE-2021-45821?

CVE-2021-45821 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-45821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45821?

CVE-2021-45821 affects Btiteam Xbtit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45821?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-45821 published?

CVE-2021-45821 was published on 2022-03-16 and last updated on 2026-06-17.

CVE-2021-45821

CVE-2021-45821 is a high-severity vulnerability in Btiteam Xbtit with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Btiteam Xbtit
Published: 2022-03-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-45821?: 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.
How severe is CVE-2021-45821?: CVE-2021-45821 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-45821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45821?: CVE-2021-45821 affects Btiteam Xbtit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-45821 published?: CVE-2021-45821 was published on 2022-03-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:btiteam:xbtit:3.1:*:*:*:*:*:*:*

More vulnerabilities in Btiteam Xbtit

CVE-2018-15681 — Critical (CVSS 9.8): An issue was discovered in BTITeam XBTIT 2.5.4. When a user logs in, their password hash is rehashed using a…
CVE-2018-15680 — Critical (CVSS 9.8): An issue was discovered in BTITeam XBTIT 2.5.4. The hashed passwords stored in the xbtit_users table are stored as…
CVE-2018-15682 — High (CVSS 8.8): An issue was discovered in BTITeam XBTIT. Due to a lack of cross-site request forgery protection, it is possible to…
CVE-2021-45822 — Medium (CVSS 6.1): A cross-site scripting vulnerability is present in Xbtit 3.1. The stored XSS vulnerability occurs because…
CVE-2018-17870 — Medium (CVSS 6.1): An issue was discovered in BTITeam XBTIT 2.5.4. The "returnto" parameter of account_change.php is vulnerable to an open…
CVE-2018-16361 — Medium (CVSS 6.1): An issue was discovered in BTITeam XBTIT 2.5.4. news.php allows XSS via the id parameter.

All CVEs affecting Btiteam Xbtit →

Other CWE-89 (SQL Injection) vulnerabilities

CVE-2026-54350 — Critical (CVSS 10.0): Budibase is an open-source low-code platform. Prior to 3.39.12, an unauthenticated visitor of any published Budibase…
CVE-2026-8054 — Critical (CVSS 10.0): Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') in the Publish Audit API endpoints…
CVE-2026-42287 — Critical (CVSS 10.0): Emlog is an open source website building system. Prior to version 2.6.11, direct SQL injection in article creation and…
CVE-2026-3325 — Critical (CVSS 10.0): SQL injection (SQLi) in MegaCMS v12.0.0, specifically in the “id_territorio” parameter of the…
CVE-2025-10878 — Critical (CVSS 10.0): A SQL injection vulnerability exists in the login functionality of Fikir Odalari AdminPando 1.0.1 before 2026-01-26.…
CVE-2025-57792 — Critical (CVSS 10.0): Explorance Blue versions prior to 8.14.9 contain a SQL injection vulnerability caused by insufficient validation of…

Browse all CWE-89 (SQL Injection) vulnerabilities →