Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability. This vulnerability allows low-privileged attackers to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field. A successful attacker can abuse this to achieve session takeover, increasing the confidentiality, and integrity impact to high.
Exploitation of this issue requires user interaction, meaning that a victim must browse to the page containing the vulnerable field. Organizations should prioritize patching immediately to mitigate the risk associated with this vulnerability.
The CVSS score for this vulnerability is 8.7, indicating a high severity level. The vulnerability is classified under CWE-79, which pertains to improper neutralization of input during web page generation ('Cross-site Scripting'). As such, it poses a substantial risk to organizations utilizing affected versions of Adobe Commerce.
Given the nature of this vulnerability, it is essential for organizations to assess their exposure and take necessary actions to remediate it.
Vulnerability Details
The vulnerability identified as CVE-2026-21290 is a stored Cross-Site Scripting (XSS) vulnerability affecting multiple versions of Adobe Commerce. The vulnerability allows attackers to inject malicious scripts, leading to potential session takeover.
The CVSS score of 8.7 indicates a high severity level, with the attack vector being network-based. User interaction is required for exploitation, which increases the complexity of the attack. The confidentiality and integrity impacts are rated as high, while availability is not affected.
Technical Analysis
The root cause of this vulnerability lies in the inadequate input validation mechanisms within Adobe Commerce. Attackers can exploit this weakness by injecting malicious scripts into form fields, which can then be executed within the context of the victim's browser.
The attack vector is network-based, requiring the attacker to lure victims into visiting a compromised web page. The attack complexity is low, and the privileges required are minimal, making it accessible to a wide range of attackers.
Risk & Impact Analysis
Risk to organizations includes potential session hijacking, leading to unauthorized access to sensitive information. Given the high confidentiality and integrity impacts, organizations utilizing Adobe Commerce should treat this vulnerability as critical.
The urgency for remediation is high due to the potential for exploitation. Organizations should schedule remediation as part of their priority patch cycle to mitigate risks associated with this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier are affected by this vulnerability. Organizations should ensure that they are using patched versions to prevent exploitation.
Mitigation & Remediation
Organizations should prioritize updating to the latest version of Adobe Commerce to mitigate this vulnerability. If a patch is not yet available, implementing input validation and sanitization on all user inputs can help reduce the attack surface.
In addition, organizations can benefit from conducting thorough code reviews and penetration testing to identify potential vulnerabilities in their applications.
For additional guidance, organizations can refer to our penetration testing services to validate their security posture.
Detection Guidance
Organizations should monitor their web applications for unexpected script execution and any unauthorized changes to form fields. Log indicators should include any anomalies in user input that could suggest an attempt to exploit this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its potential to lead to more severe attacks if left unaddressed. Security teams should be aware of similar patterns in vulnerabilities that allow for script injection.
This incident serves as a reminder of the importance of secure coding practices, particularly in web application development. Regular security assessments and the implementation of robust security measures can significantly reduce the likelihood of exploitation.
For further insights, organizations can explore our resources on penetration testing methodology and vulnerability management programs to enhance their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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