CVE-2025-22727 is a medium-severity vulnerability affecting the PluginOps MailChimp Subscribe Forms plugin. This vulnerability allows improper neutralization of input during web page generation, resulting in stored cross-site scripting (XSS). The issue specifically impacts versions up to 4.1 of the MailChimp Subscribe Forms plugin. The CVSS score for this vulnerability is 6.5, indicating a medium level of risk to organizations.
The exploitation of this vulnerability could allow attackers to execute arbitrary scripts in the context of a user's browser. This could lead to unauthorized actions on behalf of the user, including data theft and account compromise. Given the potential impact and the nature of XSS vulnerabilities, organizations should prioritize addressing this issue as part of their security posture.
As of the latest intelligence, there are no known public exploits for this vulnerability, and it is not listed as actively exploited. However, organizations should remain vigilant and ensure that proper input sanitization is implemented to prevent such vulnerabilities from being exploited.
Organizations should prioritize patching immediately to ensure that they are protected against potential exploitation. The urgency of remediation is heightened by the fact that vulnerabilities of this nature are often targeted in the wild.
Vulnerability Details
The official description of CVE-2025-22727 states that it represents an improper neutralization of input during web page generation, specifically leading to stored cross-site scripting (XSS) in the PluginOps MailChimp Subscribe Forms. The CVSS version is 3.1 with a base score of 6.5, categorized as medium severity. The vulnerability is classified under CWE-79, which denotes improper neutralization of input.
The affected product is the MailChimp Subscribe Forms plugin, with versions from n/a through 4.1 being vulnerable. The vulnerability was published on January 21, 2025, and has been categorized with a low attack complexity and low privileges required to exploit.
Technical Analysis
The root cause of CVE-2025-22727 stems from the inadequate handling of user input in the PluginOps MailChimp Subscribe Forms. When a user submits data, the plugin fails to properly sanitize the input before rendering it on the web page. This oversight allows an attacker to inject malicious scripts that are stored and executed when other users access the affected page.
The attack vector is network-based, meaning that an attacker can exploit this vulnerability remotely. The attack complexity is low, requiring minimal effort to conduct the attack. Low privileges are required to execute the attack, as it can be performed by any user interacting with the plugin. User interaction is necessary, as the victim must access the page that contains the malicious script.
The impact on confidentiality, integrity, and availability is categorized as low, but the potential for unauthorized actions by attackers poses a significant risk to user data and trust.
Risk & Impact Analysis
The deployment of this vulnerability could lead to significant risks for organizations using the PluginOps MailChimp Subscribe Forms. Given the nature of stored XSS vulnerabilities, attackers may exploit the weakness to execute scripts in the context of other users' sessions, potentially leading to data theft, account takeovers, and a loss of customer trust.
The potential blast radius includes all users who interact with the affected forms, as well as any associated data that may be compromised. Organizations must recognize that the longer they delay in addressing this vulnerability, the greater the risk of exploitation and the potential for damage.
Based on the CVSS score and the current status of exploitation, organizations should address this vulnerability in their priority patch cycle, ensuring that they are not left vulnerable to potential attacks that could arise in the future.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version of the PluginOps MailChimp Subscribe Forms plugin is from n/a through 4.1. Organizations using these versions should take immediate action to remediate the vulnerability.
Mitigation & Remediation
To mitigate CVE-2025-22727, organizations should implement the latest patches for the PluginOps MailChimp Subscribe Forms plugin. If a patch is unavailable, consider applying input validation and sanitization measures to mitigate the risk of XSS vulnerabilities. Network controls can also be implemented to limit exposure.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for any unusual activity related to user interactions with the MailChimp Subscribe Forms. Behavioral anomalies, such as unexpected changes in user behavior or access patterns, may indicate exploitation attempts. Implementing network signature detection can also help identify potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-22727 lies in its representation of common vulnerabilities in web applications that fail to adequately sanitize user input. As organizations increasingly rely on plugins to enhance functionality, the potential for vulnerabilities to be introduced rises.
Security teams should learn from this incident by implementing rigorous validation and sanitization processes for all user inputs. Additionally, understanding the patterns of vulnerabilities, including XSS, can help in developing a proactive security strategy.
For more information on effective vulnerability management, organizations can refer to our vulnerability management program resources. Implementing a comprehensive program can significantly enhance your organization's security posture.
Regularly conducting penetration testing not only identifies potential vulnerabilities but also reinforces the importance of security best practices across your organization.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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