CVE-2021-20873 : Security Advisory and Response
Learn about CVE-2021-20873 impacting Yappli. Android apps developed with specific versions are at risk of unauthorized redirection via crafted URLs. Find out more about the impact and mitigation.
Yappli, an application development platform, is affected by an improper authorization vulnerability in the Custom URL Scheme handler. Android apps developed with Yappli versions since v7.3.6 and prior to v9.30.0 may be directed to unintended sites via a specially crafted URL.
Understanding CVE-2021-20873
This section will delve into the details of the CVE-2021-20873 vulnerability affecting Yappli.
What is CVE-2021-20873?
Yappli, Inc.'s application development platform, Yappli, is vulnerable to an improper authorization issue in the Custom URL Scheme handler. This vulnerability allows Android apps developed with specific versions of Yappli to be manipulated to visit unintended sites.
The Impact of CVE-2021-20873
The impact of this vulnerability is that attackers can exploit it to redirect users to malicious sites by crafting special URLs. This poses a significant risk to the security and integrity of user data and devices.
Technical Details of CVE-2021-20873
Explore the technical aspects of the CVE-2021-20873 vulnerability in Yappli.
Vulnerability Description
The vulnerability in Yappli versions since v7.3.6 and prior to v9.30.0 lies in the improper authorization within the Custom URL Scheme handler, enabling unauthorized access to URLs.
Affected Systems and Versions
Android apps developed using Yappli versions since v7.3.6 and before v9.30.0 are impacted by this vulnerability, highlighting the importance of updating to a secure version.
Exploitation Mechanism
By crafting a malicious URL, threat actors can exploit this vulnerability to steer users towards unintended websites, jeopardizing user privacy and security.
Mitigation and Prevention
Discover the steps to mitigate and prevent the CVE-2021-20873 vulnerability in Yappli.
Immediate Steps to Take
Users are advised to update their Yappli applications to version v9.30.0 or above to safeguard against the unauthorized redirection risks associated with this vulnerability.
Long-Term Security Practices
Regularly updating software and maintaining awareness of potential security threats are essential long-term practices to enhance the overall security posture.
Patching and Updates
Yappli users should stay informed about security updates and promptly apply patches released by the vendor to address known vulnerabilities and enhance system security.