CVE-2025-49557 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Commerce versions 2.4.9-alpha1, 2.4.8-p1, 2.4.7-p6, 2.4.6-p11, 2.4.5-p13, 2.4.4-p14, and earlier. This vulnerability arises from insufficient sanitization of user-supplied input in certain form fields, allowing an attacker with low privileges to inject malicious JavaScript code that is persistently stored on the server. When other users access the affected pages, the malicious script executes in their browsers within the context of the vulnerable site. This can lead to session hijacking, enabling attackers to impersonate legitimate users, steal sensitive data, or perform unauthorized actions. The vulnerability requires user interaction, as victims must visit the compromised page to trigger the exploit. The scope is changed, meaning the attack can impact resources beyond the attacker’s initial access level, increasing the severity. The CVSS 3.1 score of 8.7 reflects a network attack vector with low complexity, requiring privileges but user interaction, and resulting in high confidentiality and integrity impacts without affecting availability. No public exploits have been reported yet, but the vulnerability poses a significant risk due to the widespread use of Adobe Commerce in e-commerce platforms globally.

The impact of CVE-2025-49557 is substantial for organizations using Adobe Commerce, particularly those operating e-commerce websites. Successful exploitation can lead to session hijacking, allowing attackers to impersonate legitimate users, including administrators or customers, potentially leading to unauthorized transactions, data theft, or manipulation of site content. The confidentiality and integrity of user data and business operations are at high risk. While availability is not directly affected, the reputational damage and potential regulatory consequences from data breaches can be severe. Given Adobe Commerce's extensive deployment in retail, wholesale, and service sectors worldwide, the vulnerability could facilitate large-scale attacks targeting customer accounts and sensitive business information. The requirement for user interaction somewhat limits automated exploitation but does not diminish the threat posed by social engineering or phishing campaigns that lure users to maliciously crafted pages.

Organizations should immediately prioritize updating Adobe Commerce to the latest patched versions once available, as no patches are currently linked but are expected given the vulnerability's severity. In the interim, implement strict input validation and output encoding on all user-supplied data fields to prevent script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Monitor web application logs for unusual input patterns or repeated attempts to inject scripts. Educate users and administrators about the risks of clicking on suspicious links and encourage the use of multi-factor authentication to reduce the impact of session hijacking. Additionally, conduct regular security assessments and penetration testing focused on XSS vulnerabilities. Segmentation of administrative interfaces and limiting user privileges can further reduce the attack surface. Finally, prepare incident response plans to quickly address potential exploitation attempts.