CVE-2026-107653: SureCart <= 4.9.4 - Unauthenticated Stored Cross-Site Scripting via 'manual-payment-instructions' Attribute of sc-order-manual-instructions in Comments

Q: Who can exploit this issue?

An unauthenticated attacker can submit a malicious comment; no account or prior privileges are required. The comment must then be auto-approved or approved by a moderator before it can trigger.

Q: Which pages are at risk of executing an injected script?

The approved malicious comment must be displayed on a page that loads SureCart's web-component bundle. An example is a page containing a SureCart Buy Button block.

Q: How can I determine whether my site may already be affected?

Review approved and auto-approved comments for suspicious script-like content, particularly comments displayed on pages that include SureCart components. Versions through 4.9.4 are affected according to the available information.

Q: What can be done while patching is not immediately possible?

Prevent untrusted comments from being auto-approved and carefully moderate comments before approval. Review and remove suspicious approved comments from pages that load the SureCart web-component bundle.

Published Oct 31, 2026

Updated

The SureCart – Ecommerce Made Easy For Selling Physical Products, Digital Downloads, Subscriptions, Donations, & Payments plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 4.9.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful execution requires the injected comment to be visible on a page that loads SureCart's web-component bundle (e.g. a page containing a SureCart Buy Button block), and the comment must be auto-approved or approved by a moderator.

Event History

Oct 31, 2026

CVE Published

via MITRE·06:44 AM

Data Sourced

via MITRE·06:44 AM

DescriptionSeverityWeakness

Data Sourced

via NVD·07:16 AM

DescriptionSeverityWeakness

Frequently Asked Questions

Who can exploit this issue?

An unauthenticated attacker can submit a malicious comment; no account or prior privileges are required. The comment must then be auto-approved or approved by a moderator before it can trigger.

Which pages are at risk of executing an injected script?

The approved malicious comment must be displayed on a page that loads SureCart's web-component bundle. An example is a page containing a SureCart Buy Button block.

How can I determine whether my site may already be affected?

Review approved and auto-approved comments for suspicious script-like content, particularly comments displayed on pages that include SureCart components. Versions through 4.9.4 are affected according to the available information.

What can be done while patching is not immediately possible?

Prevent untrusted comments from being auto-approved and carefully moderate comments before approval. Review and remove suspicious approved comments from pages that load the SureCart web-component bundle.

CVE-2026-107653: SureCart <= 4.9.4 - Unauthenticated Stored Cross-Site Scripting via 'manual-payment-instructions' Attribute of sc-order-manual-instructions in Comments

Event History

Frequently Asked Questions

Who can exploit this issue?

Which pages are at risk of executing an injected script?

How can I determine whether my site may already be affected?

What can be done while patching is not immediately possible?

Company

Resources

Contact

Frequently Asked Questions

Who can exploit this issue?

Which pages are at risk of executing an injected script?

How can I determine whether my site may already be affected?

What can be done while patching is not immediately possible?