CVE-2026-28138 is a high-severity vulnerability affecting the Stylemix uListing plugin. This vulnerability allows deserialization of untrusted data, enabling object injection, which can lead to significant security risks. Organizations utilizing versions of uListing up to and including 2.2.0 are particularly impacted. With a CVSS score of 7.2, this vulnerability poses a serious threat due to its potential for exploitation over the network with low complexity.
The risk to organizations includes unauthorized access and manipulation of data, potentially compromising the integrity and confidentiality of the affected systems. Given the nature of the vulnerability, organizations should prioritize patching immediately to safeguard their environments.
Currently, there are no known public exploits for this vulnerability, but the lack of a patch increases the urgency for organizations to address it. As security threats continue to evolve, proactively managing and mitigating vulnerabilities is crucial in maintaining a secure operational environment.
Organizations should remain vigilant and monitor their systems for any signs of exploitation while preparing to implement the necessary updates as soon as they are available.
Vulnerability Details
The vulnerability identified as CVE-2026-28138 is classified as a deserialization of untrusted data vulnerability. This issue specifically affects the Stylemix uListing plugin, allowing for object injection. The severity level of this vulnerability is assessed as high, with a CVSS score of 7.2, indicating significant impact potential.
The vulnerability is present in all versions of the uListing plugin prior to version 2.2.0. The official description states that it allows for object injection, which could be exploited to perform unauthorized actions within the application.
The CVSS vector string for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, highlighting the attack vector as network-based, with low complexity and high privileges required for exploitation. This means that an attacker would need to have high-level access to exploit the vulnerability effectively.
The vulnerability was published on February 26, 2026, and has been classified under CWE-502.
Technical Analysis
The root cause of this vulnerability stems from improper handling of serialized data, which can lead to deserialization of untrusted data. When untrusted data is deserialized, it can result in the execution of arbitrary code, allowing attackers to manipulate object properties and potentially gain unauthorized access to system resources.
The attack vector for this vulnerability is network-based, meaning that an attacker located on the same network could potentially exploit this vulnerability without needing physical access to the system. The attack complexity is low, as it does not require extensive technical knowledge to execute the attack.
Exploitation of this vulnerability requires high privileges, indicating that an attacker must have some level of access to the system in order to perform the exploitation. User interaction is not required, making it easier for an attacker to execute the attack without needing to convince a user to perform any actions.
The impact on confidentiality, integrity, and availability is high, meaning that successful exploitation could lead to significant data breaches and system downtimes.
Risk & Impact Analysis
Organizations using the affected versions of the uListing plugin face real-world risks, including unauthorized access to sensitive data and potential system compromise. The exploitation of this vulnerability can lead to extensive data manipulation and unauthorized actions within the application, creating a significant blast radius for any organization that fails to address it.
Given the high CVSS score and the inherent risks posed by this vulnerability, organizations should prioritize remediation as part of their security posture. The potential for exploitation underscores the need for immediate action to mitigate risks.
The urgency of addressing this vulnerability is further emphasized by the fact that it affects a widely used plugin in the WordPress ecosystem. Failure to patch can lead to significant repercussions, including data breaches and loss of customer trust.
Organizations should schedule remediation as soon as possible to ensure that they are protected against potential exploitation of this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of the uListing plugin prior to version 2.2.0 are affected by this vulnerability. Organizations should check their current versions and ensure they are updated to the latest release that addresses this issue.
Mitigation & Remediation
To mitigate the risk posed by CVE-2026-28138, organizations should prioritize updating the uListing plugin to version 2.2.1 or later, which addresses the vulnerability. In cases where immediate patching is not possible, organizations should implement additional security controls such as input validation and sanitization to reduce the attack surface.
For comprehensive security validation, organizations may consider engaging in penetration testing to ensure that other vulnerabilities are not present in their systems.
Detection Guidance
Organizations should monitor logs for unusual activity related to object deserialization and review the integrity of serialized data being processed by the uListing plugin. Behavioral anomalies that indicate potential exploitation attempts should be flagged for further investigation.
AppSecure Threat Intelligence Insight
CVE-2026-28138 highlights the persistent vulnerabilities associated with deserialization processes, a common issue in many applications. Security teams should evaluate their application architectures to identify potential weaknesses and implement robust deserialization mechanisms.
For further insights on secure coding practices, organizations may refer to the following resources: secure coding practices and vulnerability management programs that can help in preventing similar vulnerabilities in the future.
Lastly, organizations should engage in regular security assessments to adapt to evolving threats, ensuring their defenses are robust and effective.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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