CVE-2020-13758 : Security Advisory and Response
Learn about CVE-2020-13758 affecting Bitrix24 through 20.0.950, allowing XSS attacks. Find mitigation steps and the impact of this security vulnerability.
Bitrix24 through version 20.0.950 is vulnerable to XSS via the Web Application Firewall.
Understanding CVE-2020-13758
Bitrix24's security module allows for a cross-site scripting (XSS) attack by inserting %00 before the payload.
What is CVE-2020-13758?
The vulnerability in Bitrix24's Web Application Firewall permits XSS attacks when %00 is placed before the payload.
The Impact of CVE-2020-13758
This vulnerability could allow malicious actors to execute arbitrary scripts in the context of the user's browser, potentially leading to unauthorized actions.
Technical Details of CVE-2020-13758
Bitrix24's security flaw explained.
Vulnerability Description
The issue lies in the general.post_filter.php module of the Web Application Firewall in Bitrix24 versions up to 20.0.950, enabling XSS attacks.
Affected Systems and Versions
- Product: Bitrix24
- Vendor: Bitrix24
- Versions affected: up to 20.0.950
Exploitation Mechanism
Attackers can exploit this vulnerability by inserting %00 before the payload, bypassing security measures.
Mitigation and Prevention
Protect your systems from CVE-2020-13758.
Immediate Steps to Take
- Update Bitrix24 to the latest version to patch the vulnerability.
- Implement strict input validation to prevent XSS attacks.
Long-Term Security Practices
- Regularly monitor security advisories for Bitrix24.
- Educate users on safe browsing practices to mitigate XSS risks.
Patching and Updates
Ensure timely installation of security patches and updates to safeguard against known vulnerabilities.