CVE-2025-23767: Medium Vulnerability in revoxis Marmoset Viewer

CVE-2025-23767 is a medium-severity vulnerability characterized as an improper neutralization of input during web page generation, specifically a stored cross-site scripting (XSS) issue found in the revoxis Marmoset Viewer plugin. The vulnerability allows attackers to inject malicious scripts into the application, which can then be executed in the context of other users, potentially leading to unauthorized access to sensitive information or actions being performed on behalf of the user.

The CVSS score for this vulnerability is 6.5, indicating medium severity. The attack vector is network-based, which means that attackers can exploit this vulnerability remotely over the network. The attack complexity is low, requiring minimal technical skill to execute. Additionally, the exploitation requires low privileges and user interaction, as a victim must visit a compromised page for the attack to succeed.

Organizations utilizing the Marmoset Viewer plugin, particularly versions 1.9.3 and below, must recognize the potential risks associated with this vulnerability. Given the nature of stored XSS, the impact can be significant, as it may affect multiple users and lead to data breaches or account takeovers.

With the vulnerability status marked as deferred, it underscores the importance of monitoring security advisories for updates regarding remediation. Organizations should prioritize addressing this vulnerability in their patch management cycles to mitigate risks effectively.

Vulnerability Details

The vulnerability affects the revoxis Marmoset Viewer plugin for WordPress, specifically allowing stored XSS. The vulnerability is categorized under CWE-79. The last published date for this vulnerability is January 16, 2025. Currently, there is no public exploit confirmed, and the vendor has not reported any specific versions affected apart from those earlier than or equal to 1.9.3.

Technical Analysis

The root cause of CVE-2025-23767 is the improper handling of user input during web page generation, which fails to sanitize input adequately. This oversight allows attackers to inject malicious scripts that can execute in the context of other users. The attack vector is primarily network-based, allowing exploitation via malicious links or scripts hosted on compromised sites.

The attack complexity is classified as low, meaning that it does not require advanced skills to exploit. Privileges required are low, as the attack can be initiated by any user with access to the affected web application. User interaction is necessary since a victim must load a page that contains the malicious script for the attack to succeed.

The confidentiality impact is low as the attack may allow unauthorized access to user data, while the integrity and availability impacts are similarly low, primarily affecting user sessions without direct server disruption.

Risk & Impact Analysis

Risk to organizations includes the possibility of attackers leveraging this vulnerability to capture sensitive data, hijack user sessions, or perform unauthorized actions on behalf of users. The potential blast radius is significant, especially for organizations with a large user base utilizing the Marmoset Viewer plugin.

Given the medium CVSS score of 6.5, organizations should address this vulnerability in their priority patch cycle. The exploitation is not currently known to be actively exploited, but the nature of XSS vulnerabilities means they can be leveraged opportunistically by attackers.

Organizations are encouraged to remain vigilant, as the lack of current exploitation does not negate the risk posed by this vulnerability. Prompt remediation will help mitigate potential threats and protect against future attacks.

Exploitation Status

Affected Versions

All versions of the revoxis Marmoset Viewer plugin prior to the patched version 1.9.3 are affected by this vulnerability. Organizations should ensure that they are using the latest version to mitigate the risk of exploitation.

Mitigation & Remediation

Organizations utilizing the Marmoset Viewer plugin should prioritize applying updates and patches to version 1.9.4 or later as soon as they become available. If a patch is not immediately available, implementing input validation and sanitization practices can help mitigate the risk of stored XSS vulnerabilities.

In addition, organizations should consider implementing network controls to restrict access to the application and monitoring for unusual activity that may indicate exploitation attempts. For more details on effective security practices, organizations can refer to our penetration testing services.

Detection Guidance

To detect potential exploitation of this vulnerability, organizations should monitor logs for any suspicious input patterns typical of XSS attacks, such as unusual script tags or event handlers. Additionally, behavioral anomalies within user sessions may indicate compromised accounts.

AppSecure Threat Intelligence Insight

CVE-2025-23767 highlights an ongoing trend in web application vulnerabilities, particularly concerning cross-site scripting. This vulnerability serves as a reminder of the importance of secure coding practices and regular security assessments to identify and remediate such risks proactively.

As attackers continuously evolve their methods, organizations must remain vigilant and incorporate security testing, such as web application penetration testing, into their security programs to strengthen their defenses.

Additionally, organizations should educate development teams about common vulnerabilities and the importance of adopting secure coding standards to prevent similar issues from occurring in the future.

For comprehensive risk management, organizations can leverage resources such as our vulnerability management program design guidelines to ensure a proactive approach to identifying and addressing security vulnerabilities.