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CVE-2026-11975 SimplCommerce CVE debrief

CVE-2026-11975 is a stored cross-site scripting (XSS) vulnerability in the NewsItemApiController of SimplCommerce, a popular e-commerce platform. An authenticated administrator can exploit this vulnerability by injecting malicious JavaScript code into the ShortContent and FullContent fields, which are stored without proper HTML sanitization. When rendered unencoded via @Html.Raw(), this code can be executed by other users, potentially leading to unauthorized actions or data theft. The vulnerability has a CVSS score of 6.2 and is classified as MEDIUM severity. It was published on June 17, 2026, and last modified on the same day.

Vendor
SimplCommerce
Product
SimplCommerce
CVSS
MEDIUM 6.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-17
Advisory published
2026-06-17
Advisory updated
2026-06-17

Who should care

Administrators and users of SimplCommerce platforms should be aware of this vulnerability, especially those with administrative privileges. Developers and security teams responsible for maintaining and securing e-commerce sites built on SimplCommerce should prioritize patching this vulnerability to prevent potential exploitation.

Technical summary

The vulnerability exists in the NewsItemApiController of SimplCommerce due to inadequate sanitization of user-input data. Specifically, the ShortContent and FullContent fields do not undergo proper HTML sanitization when stored. As a result, an authenticated administrator can inject malicious JavaScript code into these fields. When the content is rendered using @Html.Raw() without encoding, the injected JavaScript code is executed, leading to a stored XSS attack. This vulnerability requires administrative privileges to exploit but can have significant impacts on the security of the affected application.

Defensive priority

High

Recommended defensive actions

  • Apply the patch from commit 6142d3b5 or later to ensure proper HTML sanitization of user-input data.
  • Implement additional security measures such as Content Security Policy (CSP) to mitigate XSS attacks.
  • Regularly update and patch SimplCommerce installations to prevent exploitation of known vulnerabilities.
  • Use encoding when rendering user-generated content to prevent code injection.
  • Monitor for suspicious activity and implement logging and alerting for potential security incidents.
  • Limit administrative privileges to only those who require them for daily operations.
  • Perform regular security audits and vulnerability assessments to identify potential issues.

Evidence notes

The information provided is based on the CVE-2026-11975 record and related sources. The vulnerability details and impact are derived from the CVE description and CVSS score. The recommended actions are based on standard security practices for mitigating XSS vulnerabilities.

Official resources

CVE-2026-11975 was published on June 17, 2026, and last modified on the same day.