CVE-2020-26259 is a vulnerability that was discovered in the Apache Struts framework, a popular open-source web application development framework. The vulnerability allows an attacker to execute code remotely on a targeted system through a malicious payload delivered through a specially crafted HTTP request. This flaw exists due to inadequate validation of user input in the framework's file upload function.
The vulnerability was disclosed in November 2020 and assigned CVE-2020-26259 by the Common Vulnerabilities and Exposures (CVE) project. In response, the Apache Struts team released a security advisory recommending that users upgrade to version 2.5.25 or apply a patch to address the vulnerability. As CVE-2020-26259 is a critical flaw that could allow attackers to take complete control over vulnerable systems, it is essential for organizations using the affected versions of the Apache Struts framework to update their software as soon as possible.
Overall, the discovery of CVE-2020-26259 highlights the importance of regularly maintaining and updating software to ensure that any known vulnerabilities are patched promptly. Failure to do so can leave systems exposed to attack and potentially lead to significant data breaches or other security incidents.