CVE-2026-31820 pertains to an authenticated Insecure Direct Object Reference (IDOR) vulnerability within the Sylius eCommerce framework, which operates on Symfony. This vulnerability allows attackers to exploit unvalidated resource IDs through #[LiveArg] parameters across multiple shop LiveComponents. The severity of this vulnerability is classified as high, with a CVSS score of 7.1, indicating a significant risk to organizations utilizing Sylius.
Due to the nature of the IDOR vulnerability, attackers may leverage this flaw to gain unauthorized access to sensitive information such as user addresses and order details. The impact is particularly concerning given that the vulnerability exists in components responsible for managing cart and checkout functionalities, which could expose data from both active carts and completed orders.
Organizations using Sylius must address this vulnerability as a priority. The issue has been resolved in versions 2.0.16, 2.1.12, and 2.2.3 and above. Therefore, it is critical for organizations to update their systems to these versions to ensure protection against this vulnerability.
Risk to organizations includes exposure of sensitive user information, which could lead to data breaches and loss of customer trust. Organizations should prioritize patching immediately.
Vulnerability Details
The vulnerability is characterized as an Insecure Direct Object Reference (IDOR), which allows attackers to access and manipulate sensitive data without proper authorization. The issue is rooted in how resource IDs are handled in multiple LiveComponents of Sylius, particularly in the Checkout address FormComponent and Cart WidgetComponent.
The CVSS score of 7.1 indicates a high severity level due to the potential for unauthorized data exposure. With a network attack vector and low attack complexity, this vulnerability poses a substantial risk, particularly when privileges required for exploitation are low.
The official CVE description states that any action accepting a resource ID via #[LiveArg] and loading it without ownership validation is vulnerable. Specifically, actions such as addressFieldUpdated and refreshCart are affected, compromising user information and order details.
The vulnerability was published on March 10, 2026, and has been classified under CWE-639, which relates to improper restriction of operations within the bounds of a memory buffer.
Technical Analysis
The root cause of CVE-2026-31820 stems from inadequate validation of resource IDs passed through user-controlled parameters in multiple LiveComponents. This design flaw permits unauthorized access to sensitive user data, as unvalidated IDs can be manipulated to retrieve information pertaining to other users.
The attack vector is network-based, allowing attackers to exploit the vulnerability remotely. The attack complexity is low, meaning that a minimal level of skill is required to exploit the vulnerability. The privileges required to perform the attack are low, allowing unauthenticated users to gain access to unauthorized data.
User interaction is not required to exploit this vulnerability, making it particularly dangerous. The confidentiality impact is rated as high, indicating that sensitive information can be easily accessed, while the integrity and availability impacts remain unaffected.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant, particularly for organizations that rely on Sylius for eCommerce functionalities. The exposure of sensitive user data, including personal and financial information, poses a substantial threat to customer trust and regulatory compliance.
The potential blast radius of this vulnerability is extensive, affecting not only individual user accounts but also the overall integrity of the eCommerce platform. Organizations should assess the urgency of remediation based on the CVSS score and prioritize patching in their update cycles.
Given the high severity of this vulnerability, organizations must act swiftly to mitigate risks. Prioritizing the application of the patch and implementing additional security measures, such as access control mechanisms, is essential to safeguarding sensitive information.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions of Sylius are affected by this vulnerability: All versions prior to vendor patch, specifically versions below 2.0.16, 2.1.12, and 2.2.3.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the latest patches provided by Sylius. Specifically, users should upgrade to versions 2.0.16, 2.1.12, or 2.2.3 and above. In addition, implementing strict access controls and performing regular security assessments can help prevent unauthorized access.
Organizations may also consider conducting a comprehensive security review, leveraging penetration testing to identify potential weaknesses in their implementation.
Detection Guidance
Organizations should monitor logs for unusual access patterns, particularly in the cart and checkout components of their applications. Behavioral anomalies, such as unexpected retrieval of user data, should be flagged for review. Additionally, implementing network signatures to detect potential exploitation attempts can enhance security posture.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-31820 highlights the critical importance of proper input validation within web applications. This vulnerability exemplifies a common flaw that can lead to extensive data exposure if not adequately addressed.
Security teams should take this incident as a lesson to reinforce their validation mechanisms and adopt best practices for securing user-generated input. Furthermore, understanding the patterns of vulnerabilities within their applications can help proactively mitigate similar risks in the future.
For organizations leveraging Sylius, it is imperative to remain vigilant and implement continuous security testing practices. Regular assessments, such as continuous penetration testing, can provide ongoing insights into potential weaknesses that could be exploited.
By maintaining a proactive security posture and adhering to best practices, organizations can significantly reduce the risk of exploitation and protect their users' sensitive information.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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