CVE-2026-27440 is a medium-severity vulnerability classified as a Cross-site Scripting (XSS) issue in the myCred plugin developed by Saad Iqbal. This vulnerability allows stored XSS attacks, potentially enabling attackers to execute malicious scripts in the context of affected users. The vulnerability affects myCred versions from n/a to 2.9.7.6.
The CVSS score for this vulnerability is 6.5, indicating a medium severity level. Organizations using affected versions should take immediate action to assess their exposure to this vulnerability. The attack vector is network-based, requiring low privileges and user interaction, which increases the risk of exploitation if not addressed.
Risk to organizations includes potential unauthorized access to user data and the possibility of further exploitation through the execution of malicious scripts. Organizations should prioritize patching immediately to mitigate these risks.
Currently, there is no known public exploit for this vulnerability, and it is not included in the Known Exploited Vulnerabilities (KEV) catalog. However, the low exploitability score indicates that while the risk is moderate, it is still present.
Vulnerability Details
The vulnerability is characterized by improper neutralization of input during web page generation, specifically allowing for stored XSS. The CVSS version 3.1 vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, which outlines the attack characteristics.
The affected product is the myCred plugin, specifically versions from n/a to 2.9.7.6. The vulnerability was published on February 19, 2026.
The related Common Weakness Enumeration (CWE) classification for this vulnerability is CWE-79.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of user input during the generation of web pages. Attackers can exploit this weakness by injecting malicious scripts that are stored and executed when other users access the impacted site.
The primary attack vector is through network interactions, meaning attackers can exploit this vulnerability remotely. The complexity of the attack is low, requiring minimal technical skills, making it accessible to a wide range of potential attackers.
Low privileges are required for exploitation, but user interaction is necessary, as victims must engage with the malicious content. The impacts on confidentiality, integrity, and availability are all rated as low (C:L/I:L/A:L), indicating that while the potential for damage exists, it is limited.
Risk & Impact Analysis
The real-world risk stemming from CVE-2026-27440 is significant, particularly for organizations that rely on the myCred plugin for managing user credentials and interactions. The vulnerability's nature allows attackers to execute scripts which could lead to data theft or unauthorized actions performed on behalf of users.
Given the CVSS score of 6.5 and the current lack of known exploits, the urgency for remediation is identified as medium. Organizations should schedule remediation promptly, ensuring that all affected systems are updated to mitigate the risk of exploitation.
The potential blast radius of this vulnerability is concerning; if exploited, it could impact all users of the affected plugin, leading to widespread issues across potentially numerous sites utilizing myCred.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects myCred versions from n/a through 2.9.7.6. Organizations should review their systems to identify any installations of the myCred plugin and ensure they are updated.
Mitigation & Remediation
To mitigate this vulnerability, organizations should promptly update the myCred plugin to the latest version. If immediate patching is not feasible, consider implementing input validation and output encoding to prevent the execution of malicious scripts.
For detailed guidance on security testing and validation, organizations may consider penetration testing services.
Detection Guidance
Organizations should monitor logs for unusual activities that could indicate exploitation attempts. Pay special attention to user input fields and review any changes to user-generated content. Regular security audits can also assist in identifying any potential vulnerabilities.
AppSecure Threat Intelligence Insight
CVE-2026-27440 highlights the ongoing challenges organizations face with input handling in web applications. Security teams should prioritize understanding the implications of XSS vulnerabilities and implement robust security measures.
This vulnerability serves as a reminder that even medium-severity vulnerabilities can have significant impacts if not addressed. For organizations leveraging web applications, continuous security assessments are crucial.
For further information on vulnerability management, organizations can refer to our vulnerability management program design resources.
Additionally, organizations should stay informed about trends in vulnerabilities and exploits through our blog articles to enhance their security posture.
Overall, addressing vulnerabilities like CVE-2026-27440 is essential for maintaining a secure environment in web applications.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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