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CVE-2021-21260 : What You Need to Know

Discover the details of CVE-2021-21260, a high-severity XSS vulnerability in Online Invoicing System (OIS) version 4.0. Learn about the impact, technical details, affected systems, and mitigation steps.

Online Invoicing System (OIS) version 4.0, developed by bigprof-software, is susceptible to a stored XSS vulnerability. This flaw allows an attacker to hijack the admin account by executing malicious scripts. The vulnerability arises due to unsanitized item descriptions in app/items_view.php.

Understanding CVE-2021-21260

This CVE identifies a cross-site scripting (XSS) vulnerability in the OIS software, version 4.0.

What is CVE-2021-21260?

The CVE-2021-21260 describes a stored XSS vulnerability in the Online Invoicing System (OIS) version 4.0, enabling an attacker to exploit unsanitized item descriptions.

The Impact of CVE-2021-21260

The impact of this vulnerability is rated as high severity, with a CVSS base score of 7.6. It allows attackers to compromise the integrity of the system and potentially take over the admin account.

Technical Details of CVE-2021-21260

This section covers specific technical details related to the CVE.

Vulnerability Description

The vulnerability involves the execution of malicious scripts through unsanitized item descriptions in app/items_view.php, leading to a stored XSS attack.

Affected Systems and Versions

Online Invoicing System (OIS) version 4.0 developed by bigprof-software is affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts in item descriptions, potentially leading to a takeover of the admin account.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Users are advised to update OIS to a secure version and sanitize input fields to prevent XSS attacks.

Long-Term Security Practices

Regular security audits, code reviews, and user input sanitization are essential for maintaining a secure online invoicing system.

Patching and Updates

Ensure timely installation of security patches and updates provided by bigprof-software to mitigate the risk of XSS attacks.

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