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CVE-2025-23566: High Vulnerability in Custom Post Plugin

A Cross-Site Request Forgery (CSRF) vulnerability in the Custom Post Plugin allows stored XSS, affecting versions up to 1.0. Immediate remediation is advised due to the high CVSS score of 7.1.

HIGHCVSS 7.1 · Published January 16, 2025

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CVE-2025-23566 is identified as a Cross-Site Request Forgery (CSRF) vulnerability within the Custom Post Plugin, particularly affecting the custom-post-type-gui. This vulnerability allows for stored Cross-Site Scripting (XSS), which poses significant risks to users and systems utilizing this plugin. The CVSS score for this vulnerability is rated at 7.1, categorizing it as high severity, indicating a serious risk that organizations should not overlook.

The vulnerability exists in versions up to 1.0 of the Custom Post Plugin, making it essential for organizations to review their usage of this component. The attack vector for this vulnerability is classified as network-based, and it has a low attack complexity, which means that attackers can exploit it with relative ease, especially given that no privileges are required to initiate the attack.

Risk to organizations includes unauthorized access and potential data manipulation, as attackers may leverage this vulnerability to perform malicious actions on behalf of authenticated users. Given the nature of CSRF, the impact could lead to compromised user accounts and the execution of harmful scripts that could affect the integrity of the web applications.

Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability. The urgency is underscored by the fact that it is classified as high severity and could easily be exploited in real-world scenarios.

Currently, there are no known exploits available, and this vulnerability does not appear in the Known Exploited Vulnerabilities (KEV) catalog. However, organizations should remain vigilant and ensure that their systems are updated to the latest versions of the affected plugin.

The publication date of this vulnerability is January 16, 2025, and it has been marked as deferred in the tracking status. Organizations utilizing the Custom Post Plugin should ensure they are using the latest patch to alleviate potential risks.

In summary, CVE-2025-23566 poses a significant threat due to its potential for exploitation via CSRF leading to stored XSS. Immediate action is required to secure systems against this high-severity vulnerability.

Vulnerability Details

The official description of CVE-2025-23566 states that it is a Cross-Site Request Forgery (CSRF) vulnerability in the Custom Post Plugin, specifically the custom-post-type-gui. This allows for stored XSS, affecting versions from n/a through 1.0. The CWE classification associated with this vulnerability is CWE-352.

The CVSS score is 7.1, which indicates a high severity level. The breakdown of the CVSS metrics indicates that the attack vector is network-based, with low complexity, requiring no privileges and necessitating user interaction.

This vulnerability impacts confidentiality, integrity, and availability, each rated as low. The potential for exploitation is high, underlining the importance of timely remediation.

Technical Analysis

The root cause of CVE-2025-23566 stems from inadequate validation of requests leading to CSRF vulnerabilities. Attackers can exploit this flaw by crafting malicious requests that appear to originate from legitimate users, thereby executing unwanted actions in the application's context.

The attack vector is identified as network-based, allowing attackers to initiate the exploit remotely. The complexity of the attack is considered low, making it accessible to attackers without advanced skills. Importantly, the exploitation of this vulnerability does not require any privileges, which increases its risk profile.

User interaction is required for the attack to succeed, as the victim must be tricked into clicking a malicious link or performing an action that initiates the CSRF process. The impact of this vulnerability on confidentiality, integrity, and availability is classified as low, but the potential for damage remains significant due to the nature of XSS.

Risk & Impact Analysis

The deployment of CVE-2025-23566 presents considerable real-world risks for organizations utilizing the affected plugin. The vulnerability allows attackers to perform actions on behalf of authenticated users, which can lead to unauthorized data access or manipulation.

Organizations should carefully assess the potential blast radius of this vulnerability, as it could impact a wide range of users and data. Given its high severity rating and the low complexity of exploitation, it is crucial for organizations to address this vulnerability as a top priority.

The urgency for remediation is further emphasized by the fact that the vulnerability has a CVSS score of 7.1, which indicates a high level of risk. Organizations should prioritize patching this vulnerability immediately to mitigate the threat.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

The vulnerability affects all versions of the Custom Post Plugin up to and including 1.0. Organizations should ensure that they are using the latest patched version to mitigate the risks associated with this vulnerability.

Mitigation & Remediation

Organizations should prioritize updating to the latest version of the Custom Post Plugin to address the CSRF vulnerability. If immediate patching is not possible, consider implementing workarounds such as configuring security measures to limit exposure to CSRF attacks. Additionally, regular security assessments can help identify vulnerabilities and ensure compliance with best practices.

Further guidance on securing web applications can be found in our comprehensive web application penetration testing guide.

Detection Guidance

Organizations should monitor their logs for unusual behavior that may indicate exploitation attempts. Look for repeated failed login attempts or unexpected changes to user profiles as these may suggest CSRF attacks. Additionally, implementing network signatures can help detect malicious requests.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2025-23566 lies in its representation of common vulnerabilities that can lead to serious security incidents if left unaddressed. This highlights the importance of proactive security measures and the adoption of best practices in software development.

Organizations should consider implementing continuous security assessments to identify and remediate vulnerabilities before they can be exploited. For more insights on building effective security programs, refer to our guide on building effective application security programs.

The emergence of vulnerabilities like CVE-2025-23566 is a reminder of the evolving threat landscape, making it essential for organizations to stay vigilant and adapt their security practices accordingly.

To enhance your security posture, organizations can also explore our offerings in penetration testing and security assessments.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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