Improper Access Control in Apache Commons BeanUtils: CVE-2025-48734
Summary
CVE-2025-48734: Improper Access Control vulnerability in Apache Commons. Affects commons-beanutils versions < 1.9.4-1+deb11u1. Fixed in 1.9.4-1+deb11u1. How to fix ↓
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Background
Apache Commons BeanUtils is a Java library that provides easy-to-use utilities for manipulating JavaBeans properties. It allows developers to easily access and modify properties of Java objects, making it a popular choice for applications that require dynamic property manipulation. However, a recent vulnerability has been identified that could allow attackers to exploit the library's functionality to gain unauthorized access to sensitive classloader information.
Vulnerability Detail
CVE-2025-48734 is an improper access control vulnerability that affects Apache Commons BeanUtils versions prior to 1.11.0 and 2.x before 2.0.0-M2. The vulnerability arises from the way the library handles property paths passed from external sources. An attacker can exploit this by accessing the 'declaredClass' property of Java enum objects, which can lead to unauthorized access to the ClassLoader and potentially allow the execution of arbitrary code. This issue was introduced with the addition of a special BeanIntrospector class in version 1.9.2, which was not enabled by default.
How To Fix
Minimum fixed version
1.9.4-1+deb11u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade commons-beanutilsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can disable the new BeanIntrospector to regain the old behavior. However, this is not recommended as it exposes the application to potential security risks. Instead, upgrading to the patched version is strongly advised.
Conclusion
CVE-2025-48734 is a critical vulnerability in Apache Commons BeanUtils that poses significant security risks if not addressed. Users are strongly encouraged to upgrade to the latest patched versions to mitigate these risks and protect their applications from potential exploitation.
See every vulnerability recorded for commons-beanutils →
FAQ
CVE-2025-48734 is a vulnerability in Apache Commons BeanUtils that allows attackers to access sensitive classloader information through improper access control.
The vulnerability affects Apache Commons BeanUtils versions prior to 1.11.0 and 2.x before 2.0.0-M2.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
If you cannot upgrade immediately, consider disabling the new BeanIntrospector as a temporary workaround, but be aware that this exposes your application to security risks.
If exploited, this vulnerability could allow remote attackers to access the ClassLoader and execute arbitrary code, leading to severe security breaches.
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